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Finding the Fourth Proportional to 6,387.64, 9,585.16 and 2,689.56

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Solution

The fourth proportional to 6,387.64, 9,585.16 and 2,689.56 is: 4,035.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.64 : 9,585.16 = 2,689.56 : x
  2. Step 2: Convert to fraction form
    6,387.64/9,585.16 = 2,689.56/x
  3. Step 3: Cross multiply
    6,387.64x = 9,585.16 × 2,689.56
  4. Step 4: Simplify right side
    6,387.64x = 25,779,862.93
  5. Step 5: Solve for x
    x = 25,779,862.93/6,387.64
  6. Step 6: Final answer
    x = 4,035.90

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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.