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Finding the Fourth Proportional to 10,400.40, 15,600.60 and 8,760.15

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Solution

The fourth proportional to 10,400.40, 15,600.60 and 8,760.15 is: 13,140.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,400.40 : 15,600.60 = 8,760.15 : x
  2. Step 2: Convert to fraction form
    10,400.40/15,600.60 = 8,760.15/x
  3. Step 3: Cross multiply
    10,400.40x = 15,600.60 × 8,760.15
  4. Step 4: Simplify right side
    10,400.40x = 136,663,596.09
  5. Step 5: Solve for x
    x = 136,663,596.09/10,400.40
  6. Step 6: Final answer
    x = 13,140.23

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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.