Home / 20,079.92-27,711.72-12,121.70

Finding the Fourth Proportional to 20,079.92, 27,711.72 and 12,121.70

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Solution

The fourth proportional to 20,079.92, 27,711.72 and 12,121.70 is: 16,728.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.92 : 27,711.72 = 12,121.70 : x
  2. Step 2: Convert to fraction form
    20,079.92/27,711.72 = 12,121.70/x
  3. Step 3: Cross multiply
    20,079.92x = 27,711.72 × 12,121.70
  4. Step 4: Simplify right side
    20,079.92x = 335,913,156.32
  5. Step 5: Solve for x
    x = 335,913,156.32/20,079.92
  6. Step 6: Final answer
    x = 16,728.81

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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.