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Finding the Fourth Proportional to 12,423.91, 18,635.87 and 8,516.47

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Solution

The fourth proportional to 12,423.91, 18,635.87 and 8,516.47 is: 12,774.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,423.91 : 18,635.87 = 8,516.47 : x
  2. Step 2: Convert to fraction form
    12,423.91/18,635.87 = 8,516.47/x
  3. Step 3: Cross multiply
    12,423.91x = 18,635.87 × 8,516.47
  4. Step 4: Simplify right side
    12,423.91x = 158,711,827.78
  5. Step 5: Solve for x
    x = 158,711,827.78/12,423.91
  6. Step 6: Final answer
    x = 12,774.71

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.