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Finding the Fourth Proportional to 25,617.60, 38,469.60 and 16,891.20

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Solution

The fourth proportional to 25,617.60, 38,469.60 and 16,891.20 is: 25,365.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,617.60 : 38,469.60 = 16,891.20 : x
  2. Step 2: Convert to fraction form
    25,617.60/38,469.60 = 16,891.20/x
  3. Step 3: Cross multiply
    25,617.60x = 38,469.60 × 16,891.20
  4. Step 4: Simplify right side
    25,617.60x = 649,797,707.52
  5. Step 5: Solve for x
    x = 649,797,707.52/25,617.60
  6. Step 6: Final answer
    x = 25,365.28

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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.