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Finding the Fourth Proportional to 25,891.88, 38,799.17 and 13,395.20

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Solution

The fourth proportional to 25,891.88, 38,799.17 and 13,395.20 is: 20,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,891.88 : 38,799.17 = 13,395.20 : x
  2. Step 2: Convert to fraction form
    25,891.88/38,799.17 = 13,395.20/x
  3. Step 3: Cross multiply
    25,891.88x = 38,799.17 × 13,395.20
  4. Step 4: Simplify right side
    25,891.88x = 519,722,575.01
  5. Step 5: Solve for x
    x = 519,722,575.01/25,891.88
  6. Step 6: Final answer
    x = 20,072.80

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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.