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Finding the Fourth Proportional to 8,699.52, 13,053.12 and 8,672.64

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Solution

The fourth proportional to 8,699.52, 13,053.12 and 8,672.64 is: 13,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.52 : 13,053.12 = 8,672.64 : x
  2. Step 2: Convert to fraction form
    8,699.52/13,053.12 = 8,672.64/x
  3. Step 3: Cross multiply
    8,699.52x = 13,053.12 × 8,672.64
  4. Step 4: Simplify right side
    8,699.52x = 113,205,010.64
  5. Step 5: Solve for x
    x = 113,205,010.64/8,699.52
  6. Step 6: Final answer
    x = 13,012.79

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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.