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Finding the Fourth Proportional to 25,553.70, 35,255.88 and 15,478.92

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Solution

The fourth proportional to 25,553.70, 35,255.88 and 15,478.92 is: 21,355.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,553.70 : 35,255.88 = 15,478.92 : x
  2. Step 2: Convert to fraction form
    25,553.70/35,255.88 = 15,478.92/x
  3. Step 3: Cross multiply
    25,553.70x = 35,255.88 × 15,478.92
  4. Step 4: Simplify right side
    25,553.70x = 545,722,946.05
  5. Step 5: Solve for x
    x = 545,722,946.05/25,553.70
  6. Step 6: Final answer
    x = 21,355.93

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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.