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Finding the Fourth Proportional to 7,687.52, 11,531.30 and 2,215.52

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Solution

The fourth proportional to 7,687.52, 11,531.30 and 2,215.52 is: 3,323.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,687.52 : 11,531.30 = 2,215.52 : x
  2. Step 2: Convert to fraction form
    7,687.52/11,531.30 = 2,215.52/x
  3. Step 3: Cross multiply
    7,687.52x = 11,531.30 × 2,215.52
  4. Step 4: Simplify right side
    7,687.52x = 25,547,825.78
  5. Step 5: Solve for x
    x = 25,547,825.78/7,687.52
  6. Step 6: Final answer
    x = 3,323.29

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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.