Home / 13,979.20-20,934.22-8,118.04

Finding the Fourth Proportional to 13,979.20, 20,934.22 and 8,118.04

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Solution

The fourth proportional to 13,979.20, 20,934.22 and 8,118.04 is: 12,156.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.20 : 20,934.22 = 8,118.04 : x
  2. Step 2: Convert to fraction form
    13,979.20/20,934.22 = 8,118.04/x
  3. Step 3: Cross multiply
    13,979.20x = 20,934.22 × 8,118.04
  4. Step 4: Simplify right side
    13,979.20x = 169,944,835.33
  5. Step 5: Solve for x
    x = 169,944,835.33/13,979.20
  6. Step 6: Final answer
    x = 12,156.98

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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.