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Finding the Fourth Proportional to 6,386.65, 9,581.13 and 2,638.43

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Solution

The fourth proportional to 6,386.65, 9,581.13 and 2,638.43 is: 3,958.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.65 : 9,581.13 = 2,638.43 : x
  2. Step 2: Convert to fraction form
    6,386.65/9,581.13 = 2,638.43/x
  3. Step 3: Cross multiply
    6,386.65x = 9,581.13 × 2,638.43
  4. Step 4: Simplify right side
    6,386.65x = 25,279,140.83
  5. Step 5: Solve for x
    x = 25,279,140.83/6,386.65
  6. Step 6: Final answer
    x = 3,958.12

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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.