Home / 21,006,479,602.12-28,989,633,287.33-11,490,813,591.57

Finding the Fourth Proportional to 21,006,479,602.12, 28,989,633,287.33 and 11,490,813,591.57

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Solution

The fourth proportional to 21,006,479,602.12, 28,989,633,287.33 and 11,490,813,591.57 is: 15,857,700,980.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006,479,602.12 : 28,989,633,287.33 = 11,490,813,591.57 : x
  2. Step 2: Convert to fraction form
    21,006,479,602.12/28,989,633,287.33 = 11,490,813,591.57/x
  3. Step 3: Cross multiply
    21,006,479,602.12x = 28,989,633,287.33 × 11,490,813,591.57
  4. Step 4: Simplify right side
    21,006,479,602.12x = 333,114,472,192,681,705,472
  5. Step 5: Solve for x
    x = 333,114,472,192,681,705,472/21,006,479,602.12
  6. Step 6: Final answer
    x = 15,857,700,980.94

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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.