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Finding the Fourth Proportional to 10,391.92, 15,587.88 and 2,600.80

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Solution

The fourth proportional to 10,391.92, 15,587.88 and 2,600.80 is: 3,901.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,391.92 : 15,587.88 = 2,600.80 : x
  2. Step 2: Convert to fraction form
    10,391.92/15,587.88 = 2,600.80/x
  3. Step 3: Cross multiply
    10,391.92x = 15,587.88 × 2,600.80
  4. Step 4: Simplify right side
    10,391.92x = 40,540,958.30
  5. Step 5: Solve for x
    x = 40,540,958.30/10,391.92
  6. Step 6: Final answer
    x = 3,901.20

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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.