Home / 5,565.28-7,690.32-3,990.88

Finding the Fourth Proportional to 5,565.28, 7,690.32 and 3,990.88

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Solution

The fourth proportional to 5,565.28, 7,690.32 and 3,990.88 is: 5,514.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,565.28 : 7,690.32 = 3,990.88 : x
  2. Step 2: Convert to fraction form
    5,565.28/7,690.32 = 3,990.88/x
  3. Step 3: Cross multiply
    5,565.28x = 7,690.32 × 3,990.88
  4. Step 4: Simplify right side
    5,565.28x = 30,691,144.28
  5. Step 5: Solve for x
    x = 30,691,144.28/5,565.28
  6. Step 6: Final answer
    x = 5,514.75

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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.