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Finding the Fourth Proportional to 15,892.29, 21,931.29 and 8,818.70

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Solution

The fourth proportional to 15,892.29, 21,931.29 and 8,818.70 is: 12,169.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892.29 : 21,931.29 = 8,818.70 : x
  2. Step 2: Convert to fraction form
    15,892.29/21,931.29 = 8,818.70/x
  3. Step 3: Cross multiply
    15,892.29x = 21,931.29 × 8,818.70
  4. Step 4: Simplify right side
    15,892.29x = 193,405,357.47
  5. Step 5: Solve for x
    x = 193,405,357.47/15,892.29
  6. Step 6: Final answer
    x = 12,169.76

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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.