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Finding the Fourth Proportional to 8,691.60, 13,039.80 and 2,852.28

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Solution

The fourth proportional to 8,691.60, 13,039.80 and 2,852.28 is: 4,279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.60 : 13,039.80 = 2,852.28 : x
  2. Step 2: Convert to fraction form
    8,691.60/13,039.80 = 2,852.28/x
  3. Step 3: Cross multiply
    8,691.60x = 13,039.80 × 2,852.28
  4. Step 4: Simplify right side
    8,691.60x = 37,193,160.74
  5. Step 5: Solve for x
    x = 37,193,160.74/8,691.60
  6. Step 6: Final answer
    x = 4,279.21

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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.