Home / 5,125.20-7,687.80-3,885.90

Finding the Fourth Proportional to 5,125.20, 7,687.80 and 3,885.90

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Solution

The fourth proportional to 5,125.20, 7,687.80 and 3,885.90 is: 5,828.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,125.20 : 7,687.80 = 3,885.90 : x
  2. Step 2: Convert to fraction form
    5,125.20/7,687.80 = 3,885.90/x
  3. Step 3: Cross multiply
    5,125.20x = 7,687.80 × 3,885.90
  4. Step 4: Simplify right side
    5,125.20x = 29,874,022.02
  5. Step 5: Solve for x
    x = 29,874,022.02/5,125.20
  6. Step 6: Final answer
    x = 5,828.85

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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.