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Finding the Fourth Proportional to 8,407.62, 11,600.08 and 5,425.20

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Solution

The fourth proportional to 8,407.62, 11,600.08 and 5,425.20 is: 7,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,407.62 : 11,600.08 = 5,425.20 : x
  2. Step 2: Convert to fraction form
    8,407.62/11,600.08 = 5,425.20/x
  3. Step 3: Cross multiply
    8,407.62x = 11,600.08 × 5,425.20
  4. Step 4: Simplify right side
    8,407.62x = 62,932,740.45
  5. Step 5: Solve for x
    x = 62,932,740.45/8,407.62
  6. Step 6: Final answer
    x = 7,485.20

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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.