Home / 21,006,479,604.65-28,989,633,290.76-11,490,813,594.09

Finding the Fourth Proportional to 21,006,479,604.65, 28,989,633,290.76 and 11,490,813,594.09

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Solution

The fourth proportional to 21,006,479,604.65, 28,989,633,290.76 and 11,490,813,594.09 is: 15,857,700,984.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006,479,604.65 : 28,989,633,290.76 = 11,490,813,594.09 : x
  2. Step 2: Convert to fraction form
    21,006,479,604.65/28,989,633,290.76 = 11,490,813,594.09/x
  3. Step 3: Cross multiply
    21,006,479,604.65x = 28,989,633,290.76 × 11,490,813,594.09
  4. Step 4: Simplify right side
    21,006,479,604.65x = 333,114,472,305,149,018,112
  5. Step 5: Solve for x
    x = 333,114,472,305,149,018,112/21,006,479,604.65
  6. Step 6: Final answer
    x = 15,857,700,984.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.