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Finding the Fourth Proportional to 8,708.61, 13,062.88 and 2,865.22

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Solution

The fourth proportional to 8,708.61, 13,062.88 and 2,865.22 is: 4,297.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.61 : 13,062.88 = 2,865.22 : x
  2. Step 2: Convert to fraction form
    8,708.61/13,062.88 = 2,865.22/x
  3. Step 3: Cross multiply
    8,708.61x = 13,062.88 × 2,865.22
  4. Step 4: Simplify right side
    8,708.61x = 37,428,025.03
  5. Step 5: Solve for x
    x = 37,428,025.03/8,708.61
  6. Step 6: Final answer
    x = 4,297.82

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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.