Home / 5,385.28-8,078.10-1,489.72

Finding the Fourth Proportional to 5,385.28, 8,078.10 and 1,489.72

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Solution

The fourth proportional to 5,385.28, 8,078.10 and 1,489.72 is: 2,234.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.28 : 8,078.10 = 1,489.72 : x
  2. Step 2: Convert to fraction form
    5,385.28/8,078.10 = 1,489.72/x
  3. Step 3: Cross multiply
    5,385.28x = 8,078.10 × 1,489.72
  4. Step 4: Simplify right side
    5,385.28x = 12,034,107.13
  5. Step 5: Solve for x
    x = 12,034,107.13/5,385.28
  6. Step 6: Final answer
    x = 2,234.63

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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.