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Finding the Fourth Proportional to 8,708.40, 13,061.28 and 2,865.12

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Solution

The fourth proportional to 8,708.40, 13,061.28 and 2,865.12 is: 4,297.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.40 : 13,061.28 = 2,865.12 : x
  2. Step 2: Convert to fraction form
    8,708.40/13,061.28 = 2,865.12/x
  3. Step 3: Cross multiply
    8,708.40x = 13,061.28 × 2,865.12
  4. Step 4: Simplify right side
    8,708.40x = 37,422,134.55
  5. Step 5: Solve for x
    x = 37,422,134.55/8,708.40
  6. Step 6: Final answer
    x = 4,297.25

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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.