Home / 5,382.31-7,428.21-3,144.75

Finding the Fourth Proportional to 5,382.31, 7,428.21 and 3,144.75

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Solution

The fourth proportional to 5,382.31, 7,428.21 and 3,144.75 is: 4,340.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,382.31 : 7,428.21 = 3,144.75 : x
  2. Step 2: Convert to fraction form
    5,382.31/7,428.21 = 3,144.75/x
  3. Step 3: Cross multiply
    5,382.31x = 7,428.21 × 3,144.75
  4. Step 4: Simplify right side
    5,382.31x = 23,359,863.40
  5. Step 5: Solve for x
    x = 23,359,863.40/5,382.31
  6. Step 6: Final answer
    x = 4,340.12

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Find fourth proportional to 2,691.16, 3,714.11 and 1,572.38
Half scale
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Double scale
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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.