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Finding the Fourth Proportional to 12,423.79, 18,635.68 and 8,516.35

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Solution

The fourth proportional to 12,423.79, 18,635.68 and 8,516.35 is: 12,774.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,423.79 : 18,635.68 = 8,516.35 : x
  2. Step 2: Convert to fraction form
    12,423.79/18,635.68 = 8,516.35/x
  3. Step 3: Cross multiply
    12,423.79x = 18,635.68 × 8,516.35
  4. Step 4: Simplify right side
    12,423.79x = 158,707,880.19
  5. Step 5: Solve for x
    x = 158,707,880.19/12,423.79
  6. Step 6: Final answer
    x = 12,774.52

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Double scale
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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.