Home / 20,722.60-31,081.10-8,251.80

Finding the Fourth Proportional to 20,722.60, 31,081.10 and 8,251.80

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Solution

The fourth proportional to 20,722.60, 31,081.10 and 8,251.80 is: 12,376.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.60 : 31,081.10 = 8,251.80 : x
  2. Step 2: Convert to fraction form
    20,722.60/31,081.10 = 8,251.80/x
  3. Step 3: Cross multiply
    20,722.60x = 31,081.10 × 8,251.80
  4. Step 4: Simplify right side
    20,722.60x = 256,475,020.98
  5. Step 5: Solve for x
    x = 256,475,020.98/20,722.60
  6. Step 6: Final answer
    x = 12,376.59

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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.