Home / 5,387.31-8,080.98-1,689.22

Finding the Fourth Proportional to 5,387.31, 8,080.98 and 1,689.22

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Solution

The fourth proportional to 5,387.31, 8,080.98 and 1,689.22 is: 2,533.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.31 : 8,080.98 = 1,689.22 : x
  2. Step 2: Convert to fraction form
    5,387.31/8,080.98 = 1,689.22/x
  3. Step 3: Cross multiply
    5,387.31x = 8,080.98 × 1,689.22
  4. Step 4: Simplify right side
    5,387.31x = 13,650,553.04
  5. Step 5: Solve for x
    x = 13,650,553.04/5,387.31
  6. Step 6: Final answer
    x = 2,533.83

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.