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Finding the Fourth Proportional to 18,387.62, 25,374.15 and 10,431.34

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Solution

The fourth proportional to 18,387.62, 25,374.15 and 10,431.34 is: 14,394.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387.62 : 25,374.15 = 10,431.34 : x
  2. Step 2: Convert to fraction form
    18,387.62/25,374.15 = 10,431.34/x
  3. Step 3: Cross multiply
    18,387.62x = 25,374.15 × 10,431.34
  4. Step 4: Simplify right side
    18,387.62x = 264,686,385.86
  5. Step 5: Solve for x
    x = 264,686,385.86/18,387.62
  6. Step 6: Final answer
    x = 14,394.81

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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.