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Finding the Fourth Proportional to 15,757.72, 21,731.04 and 11,502.03

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Solution

The fourth proportional to 15,757.72, 21,731.04 and 11,502.03 is: 15,862.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,757.72 : 21,731.04 = 11,502.03 : x
  2. Step 2: Convert to fraction form
    15,757.72/21,731.04 = 11,502.03/x
  3. Step 3: Cross multiply
    15,757.72x = 21,731.04 × 11,502.03
  4. Step 4: Simplify right side
    15,757.72x = 249,951,074.01
  5. Step 5: Solve for x
    x = 249,951,074.01/15,757.72
  6. Step 6: Final answer
    x = 15,862.13

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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.