Home / 20,722.38-31,085.56-8,239.62

Finding the Fourth Proportional to 20,722.38, 31,085.56 and 8,239.62

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Solution

The fourth proportional to 20,722.38, 31,085.56 and 8,239.62 is: 12,360.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.38 : 31,085.56 = 8,239.62 : x
  2. Step 2: Convert to fraction form
    20,722.38/31,085.56 = 8,239.62/x
  3. Step 3: Cross multiply
    20,722.38x = 31,085.56 × 8,239.62
  4. Step 4: Simplify right side
    20,722.38x = 256,133,328.76
  5. Step 5: Solve for x
    x = 256,133,328.76/20,722.38
  6. Step 6: Final answer
    x = 12,360.23

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Double scale
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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.