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Finding the Fourth Proportional to 15,687,758.72, 21,651,463.68 and 9,579,710.72

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Solution

The fourth proportional to 15,687,758.72, 21,651,463.68 and 9,579,710.72 is: 13,221,439.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687,758.72 : 21,651,463.68 = 9,579,710.72 : x
  2. Step 2: Convert to fraction form
    15,687,758.72/21,651,463.68 = 9,579,710.72/x
  3. Step 3: Cross multiply
    15,687,758.72x = 21,651,463.68 × 9,579,710.72
  4. Step 4: Simplify right side
    15,687,758.72x = 207,414,758,718,986.66
  5. Step 5: Solve for x
    x = 207,414,758,718,986.66/15,687,758.72
  6. Step 6: Final answer
    x = 13,221,439.88

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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.