Home / 10,481.20-15,720.54-2,689.48

Finding the Fourth Proportional to 10,481.20, 15,720.54 and 2,689.48

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Solution

The fourth proportional to 10,481.20, 15,720.54 and 2,689.48 is: 4,033.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,481.20 : 15,720.54 = 2,689.48 : x
  2. Step 2: Convert to fraction form
    10,481.20/15,720.54 = 2,689.48/x
  3. Step 3: Cross multiply
    10,481.20x = 15,720.54 × 2,689.48
  4. Step 4: Simplify right side
    10,481.20x = 42,280,077.92
  5. Step 5: Solve for x
    x = 42,280,077.92/10,481.20
  6. Step 6: Final answer
    x = 4,033.90

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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.