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Finding the Fourth Proportional to 8,687.32, 11,988.21 and 5,148.43

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Solution

The fourth proportional to 8,687.32, 11,988.21 and 5,148.43 is: 7,104.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.32 : 11,988.21 = 5,148.43 : x
  2. Step 2: Convert to fraction form
    8,687.32/11,988.21 = 5,148.43/x
  3. Step 3: Cross multiply
    8,687.32x = 11,988.21 × 5,148.43
  4. Step 4: Simplify right side
    8,687.32x = 61,720,460.01
  5. Step 5: Solve for x
    x = 61,720,460.01/8,687.32
  6. Step 6: Final answer
    x = 7,104.66

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.