Home / 2,581.40-3,872.10-2,565.20

Finding the Fourth Proportional to 2,581.40, 3,872.10 and 2,565.20

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Solution

The fourth proportional to 2,581.40, 3,872.10 and 2,565.20 is: 3,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.40 : 3,872.10 = 2,565.20 : x
  2. Step 2: Convert to fraction form
    2,581.40/3,872.10 = 2,565.20/x
  3. Step 3: Cross multiply
    2,581.40x = 3,872.10 × 2,565.20
  4. Step 4: Simplify right side
    2,581.40x = 9,932,710.92
  5. Step 5: Solve for x
    x = 9,932,710.92/2,581.40
  6. Step 6: Final answer
    x = 3,847.80

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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.