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Finding the Fourth Proportional to 12,635.62, 18,938.05 and 8,938.91

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Solution

The fourth proportional to 12,635.62, 18,938.05 and 8,938.91 is: 13,397.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,635.62 : 18,938.05 = 8,938.91 : x
  2. Step 2: Convert to fraction form
    12,635.62/18,938.05 = 8,938.91/x
  3. Step 3: Cross multiply
    12,635.62x = 18,938.05 × 8,938.91
  4. Step 4: Simplify right side
    12,635.62x = 169,285,524.53
  5. Step 5: Solve for x
    x = 169,285,524.53/12,635.62
  6. Step 6: Final answer
    x = 13,397.48

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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.