Home / 13,315.20-18,380.88-8,601.78

Finding the Fourth Proportional to 13,315.20, 18,380.88 and 8,601.78

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Solution

The fourth proportional to 13,315.20, 18,380.88 and 8,601.78 is: 11,874.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.20 : 18,380.88 = 8,601.78 : x
  2. Step 2: Convert to fraction form
    13,315.20/18,380.88 = 8,601.78/x
  3. Step 3: Cross multiply
    13,315.20x = 18,380.88 × 8,601.78
  4. Step 4: Simplify right side
    13,315.20x = 158,108,285.97
  5. Step 5: Solve for x
    x = 158,108,285.97/13,315.20
  6. Step 6: Final answer
    x = 11,874.27

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1.5x scale

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.