Home / 8,680.64-13,025.28-6,391.04

Finding the Fourth Proportional to 8,680.64, 13,025.28 and 6,391.04

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Solution

The fourth proportional to 8,680.64, 13,025.28 and 6,391.04 is: 9,589.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.64 : 13,025.28 = 6,391.04 : x
  2. Step 2: Convert to fraction form
    8,680.64/13,025.28 = 6,391.04/x
  3. Step 3: Cross multiply
    8,680.64x = 13,025.28 × 6,391.04
  4. Step 4: Simplify right side
    8,680.64x = 83,245,085.49
  5. Step 5: Solve for x
    x = 83,245,085.49/8,680.64
  6. Step 6: Final answer
    x = 9,589.74

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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.