Home / 21,006,479,601.12-28,989,633,285.95-11,490,813,590.57

Finding the Fourth Proportional to 21,006,479,601.12, 28,989,633,285.95 and 11,490,813,590.57

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Solution

The fourth proportional to 21,006,479,601.12, 28,989,633,285.95 and 11,490,813,590.57 is: 15,857,700,979.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006,479,601.12 : 28,989,633,285.95 = 11,490,813,590.57 : x
  2. Step 2: Convert to fraction form
    21,006,479,601.12/28,989,633,285.95 = 11,490,813,590.57/x
  3. Step 3: Cross multiply
    21,006,479,601.12x = 28,989,633,285.95 × 11,490,813,590.57
  4. Step 4: Simplify right side
    21,006,479,601.12x = 333,114,472,147,834,699,776
  5. Step 5: Solve for x
    x = 333,114,472,147,834,699,776/21,006,479,601.12
  6. Step 6: Final answer
    x = 15,857,700,979.56

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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.