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Finding the Fourth Proportional to 8,761.14, 13,128.66 and 8,543.79

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Solution

The fourth proportional to 8,761.14, 13,128.66 and 8,543.79 is: 12,802.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.14 : 13,128.66 = 8,543.79 : x
  2. Step 2: Convert to fraction form
    8,761.14/13,128.66 = 8,543.79/x
  3. Step 3: Cross multiply
    8,761.14x = 13,128.66 × 8,543.79
  4. Step 4: Simplify right side
    8,761.14x = 112,168,514.02
  5. Step 5: Solve for x
    x = 112,168,514.02/8,761.14
  6. Step 6: Final answer
    x = 12,802.96

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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.