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Finding the Fourth Proportional to 15,672.69, 21,627 and 8,956.17

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Solution

The fourth proportional to 15,672.69, 21,627 and 8,956.17 is: 12,358.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,672.69 : 21,627 = 8,956.17 : x
  2. Step 2: Convert to fraction form
    15,672.69/21,627 = 8,956.17/x
  3. Step 3: Cross multiply
    15,672.69x = 21,627 × 8,956.17
  4. Step 4: Simplify right side
    15,672.69x = 193,695,088.59
  5. Step 5: Solve for x
    x = 193,695,088.59/15,672.69
  6. Step 6: Final answer
    x = 12,358.76

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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.