Home / 18,871.15-28,306.77-6,391.30

Finding the Fourth Proportional to 18,871.15, 28,306.77 and 6,391.30

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Solution

The fourth proportional to 18,871.15, 28,306.77 and 6,391.30 is: 9,586.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.15 : 28,306.77 = 6,391.30 : x
  2. Step 2: Convert to fraction form
    18,871.15/28,306.77 = 6,391.30/x
  3. Step 3: Cross multiply
    18,871.15x = 28,306.77 × 6,391.30
  4. Step 4: Simplify right side
    18,871.15x = 180,917,059.10
  5. Step 5: Solve for x
    x = 180,917,059.10/18,871.15
  6. Step 6: Final answer
    x = 9,586.97

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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.