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Finding the Fourth Proportional to 18,131.61, 25,023.42 and 12,175.68

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Solution

The fourth proportional to 18,131.61, 25,023.42 and 12,175.68 is: 16,803.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,131.61 : 25,023.42 = 12,175.68 : x
  2. Step 2: Convert to fraction form
    18,131.61/25,023.42 = 12,175.68/x
  3. Step 3: Cross multiply
    18,131.61x = 25,023.42 × 12,175.68
  4. Step 4: Simplify right side
    18,131.61x = 304,677,154.43
  5. Step 5: Solve for x
    x = 304,677,154.43/18,131.61
  6. Step 6: Final answer
    x = 16,803.65

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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.