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Finding the Fourth Proportional to 15,581.29, 21,502.64 and 8,508.17

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Solution

The fourth proportional to 15,581.29, 21,502.64 and 8,508.17 is: 11,741.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,581.29 : 21,502.64 = 8,508.17 : x
  2. Step 2: Convert to fraction form
    15,581.29/21,502.64 = 8,508.17/x
  3. Step 3: Cross multiply
    15,581.29x = 21,502.64 × 8,508.17
  4. Step 4: Simplify right side
    15,581.29x = 182,948,116.57
  5. Step 5: Solve for x
    x = 182,948,116.57/15,581.29
  6. Step 6: Final answer
    x = 11,741.53

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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.