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Finding the Fourth Proportional to 11,988.57, 17,988.04 and 6,435.43

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Solution

The fourth proportional to 11,988.57, 17,988.04 and 6,435.43 is: 9,655.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.57 : 17,988.04 = 6,435.43 : x
  2. Step 2: Convert to fraction form
    11,988.57/17,988.04 = 6,435.43/x
  3. Step 3: Cross multiply
    11,988.57x = 17,988.04 × 6,435.43
  4. Step 4: Simplify right side
    11,988.57x = 115,760,711.20
  5. Step 5: Solve for x
    x = 115,760,711.20/11,988.57
  6. Step 6: Final answer
    x = 9,655.92

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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.