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Finding the Fourth Proportional to 25,469.68, 35,139.72 and 15,401.20

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Solution

The fourth proportional to 25,469.68, 35,139.72 and 15,401.20 is: 21,248.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,469.68 : 35,139.72 = 15,401.20 : x
  2. Step 2: Convert to fraction form
    25,469.68/35,139.72 = 15,401.20/x
  3. Step 3: Cross multiply
    25,469.68x = 35,139.72 × 15,401.20
  4. Step 4: Simplify right side
    25,469.68x = 541,193,855.66
  5. Step 5: Solve for x
    x = 541,193,855.66/25,469.68
  6. Step 6: Final answer
    x = 21,248.55

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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.