Home / 5,387.56-8,082.75-1,689.91

Finding the Fourth Proportional to 5,387.56, 8,082.75 and 1,689.91

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Solution

The fourth proportional to 5,387.56, 8,082.75 and 1,689.91 is: 2,535.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.56 : 8,082.75 = 1,689.91 : x
  2. Step 2: Convert to fraction form
    5,387.56/8,082.75 = 1,689.91/x
  3. Step 3: Cross multiply
    5,387.56x = 8,082.75 × 1,689.91
  4. Step 4: Simplify right side
    5,387.56x = 13,659,120.05
  5. Step 5: Solve for x
    x = 13,659,120.05/5,387.56
  6. Step 6: Final answer
    x = 2,535.31

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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.