Home / 7,680.28-11,522.76-3,985.16

Finding the Fourth Proportional to 7,680.28, 11,522.76 and 3,985.16

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Solution

The fourth proportional to 7,680.28, 11,522.76 and 3,985.16 is: 5,978.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,680.28 : 11,522.76 = 3,985.16 : x
  2. Step 2: Convert to fraction form
    7,680.28/11,522.76 = 3,985.16/x
  3. Step 3: Cross multiply
    7,680.28x = 11,522.76 × 3,985.16
  4. Step 4: Simplify right side
    7,680.28x = 45,920,042.24
  5. Step 5: Solve for x
    x = 45,920,042.24/7,680.28
  6. Step 6: Final answer
    x = 5,978.95

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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.