Home / 18,771.38-25,905.31-10,387.88

Finding the Fourth Proportional to 18,771.38, 25,905.31 and 10,387.88

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Solution

The fourth proportional to 18,771.38, 25,905.31 and 10,387.88 is: 14,335.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.38 : 25,905.31 = 10,387.88 : x
  2. Step 2: Convert to fraction form
    18,771.38/25,905.31 = 10,387.88/x
  3. Step 3: Cross multiply
    18,771.38x = 25,905.31 × 10,387.88
  4. Step 4: Simplify right side
    18,771.38x = 269,101,251.64
  5. Step 5: Solve for x
    x = 269,101,251.64/18,771.38
  6. Step 6: Final answer
    x = 14,335.72

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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.