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Finding the Fourth Proportional to 8,708.80, 12,017.04 and 5,171.28

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Solution

The fourth proportional to 8,708.80, 12,017.04 and 5,171.28 is: 7,135.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.80 : 12,017.04 = 5,171.28 : x
  2. Step 2: Convert to fraction form
    8,708.80/12,017.04 = 5,171.28/x
  3. Step 3: Cross multiply
    8,708.80x = 12,017.04 × 5,171.28
  4. Step 4: Simplify right side
    8,708.80x = 62,143,478.61
  5. Step 5: Solve for x
    x = 62,143,478.61/8,708.80
  6. Step 6: Final answer
    x = 7,135.71

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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.