Home / 20,136.33-30,220.70-10,278.23

Finding the Fourth Proportional to 20,136.33, 30,220.70 and 10,278.23

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Solution

The fourth proportional to 20,136.33, 30,220.70 and 10,278.23 is: 15,425.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.33 : 30,220.70 = 10,278.23 : x
  2. Step 2: Convert to fraction form
    20,136.33/30,220.70 = 10,278.23/x
  3. Step 3: Cross multiply
    20,136.33x = 30,220.70 × 10,278.23
  4. Step 4: Simplify right side
    20,136.33x = 310,615,102.87
  5. Step 5: Solve for x
    x = 310,615,102.87/20,136.33
  6. Step 6: Final answer
    x = 15,425.61

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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.