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Finding the Fourth Proportional to 18,291.25, 25,239.90 and 10,331.79

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Solution

The fourth proportional to 18,291.25, 25,239.90 and 10,331.79 is: 14,256.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,291.25 : 25,239.90 = 10,331.79 : x
  2. Step 2: Convert to fraction form
    18,291.25/25,239.90 = 10,331.79/x
  3. Step 3: Cross multiply
    18,291.25x = 25,239.90 × 10,331.79
  4. Step 4: Simplify right side
    18,291.25x = 260,773,346.42
  5. Step 5: Solve for x
    x = 260,773,346.42/18,291.25
  6. Step 6: Final answer
    x = 14,256.73

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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.