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Finding the Fourth Proportional to 25,728.87, 38,593.31 and 7,260.87

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Solution

The fourth proportional to 25,728.87, 38,593.31 and 7,260.87 is: 10,891.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,728.87 : 38,593.31 = 7,260.87 : x
  2. Step 2: Convert to fraction form
    25,728.87/38,593.31 = 7,260.87/x
  3. Step 3: Cross multiply
    25,728.87x = 38,593.31 × 7,260.87
  4. Step 4: Simplify right side
    25,728.87x = 280,220,970.48
  5. Step 5: Solve for x
    x = 280,220,970.48/25,728.87
  6. Step 6: Final answer
    x = 10,891.31

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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.