Home / 20,220.33-30,439.68-18,185.90

Finding the Fourth Proportional to 20,220.33, 30,439.68 and 18,185.90

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Solution

The fourth proportional to 20,220.33, 30,439.68 and 18,185.90 is: 27,377.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.33 : 30,439.68 = 18,185.90 : x
  2. Step 2: Convert to fraction form
    20,220.33/30,439.68 = 18,185.90/x
  3. Step 3: Cross multiply
    20,220.33x = 30,439.68 × 18,185.90
  4. Step 4: Simplify right side
    20,220.33x = 553,572,733.38
  5. Step 5: Solve for x
    x = 553,572,733.38/20,220.33
  6. Step 6: Final answer
    x = 27,377.04

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.