Home / 8,689.38-13,038.96-3,147.36

Finding the Fourth Proportional to 8,689.38, 13,038.96 and 3,147.36

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Solution

The fourth proportional to 8,689.38, 13,038.96 and 3,147.36 is: 4,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.38 : 13,038.96 = 3,147.36 : x
  2. Step 2: Convert to fraction form
    8,689.38/13,038.96 = 3,147.36/x
  3. Step 3: Cross multiply
    8,689.38x = 13,038.96 × 3,147.36
  4. Step 4: Simplify right side
    8,689.38x = 41,038,301.15
  5. Step 5: Solve for x
    x = 41,038,301.15/8,689.38
  6. Step 6: Final answer
    x = 4,722.81

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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.