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Finding the Fourth Proportional to 5,388.72, 8,082.87 and 1,691.07

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Solution

The fourth proportional to 5,388.72, 8,082.87 and 1,691.07 is: 2,536.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.72 : 8,082.87 = 1,691.07 : x
  2. Step 2: Convert to fraction form
    5,388.72/8,082.87 = 1,691.07/x
  3. Step 3: Cross multiply
    5,388.72x = 8,082.87 × 1,691.07
  4. Step 4: Simplify right side
    5,388.72x = 13,668,698.97
  5. Step 5: Solve for x
    x = 13,668,698.97/5,388.72
  6. Step 6: Final answer
    x = 2,536.54

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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.