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Finding the Fourth Proportional to 25,691.40, 38,537.10 and 11,867.40

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Solution

The fourth proportional to 25,691.40, 38,537.10 and 11,867.40 is: 17,801.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,691.40 : 38,537.10 = 11,867.40 : x
  2. Step 2: Convert to fraction form
    25,691.40/38,537.10 = 11,867.40/x
  3. Step 3: Cross multiply
    25,691.40x = 38,537.10 × 11,867.40
  4. Step 4: Simplify right side
    25,691.40x = 457,335,180.54
  5. Step 5: Solve for x
    x = 457,335,180.54/25,691.40
  6. Step 6: Final answer
    x = 17,801.10

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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.