Home / 9,891.20-13,649.60-5,414.90

Finding the Fourth Proportional to 9,891.20, 13,649.60 and 5,414.90

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Solution

The fourth proportional to 9,891.20, 13,649.60 and 5,414.90 is: 7,472.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.20 : 13,649.60 = 5,414.90 : x
  2. Step 2: Convert to fraction form
    9,891.20/13,649.60 = 5,414.90/x
  3. Step 3: Cross multiply
    9,891.20x = 13,649.60 × 5,414.90
  4. Step 4: Simplify right side
    9,891.20x = 73,911,219.04
  5. Step 5: Solve for x
    x = 73,911,219.04/9,891.20
  6. Step 6: Final answer
    x = 7,472.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.