Home / 20,279.70-30,398.90-13,706.55

Finding the Fourth Proportional to 20,279.70, 30,398.90 and 13,706.55

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Solution

The fourth proportional to 20,279.70, 30,398.90 and 13,706.55 is: 20,545.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.70 : 30,398.90 = 13,706.55 : x
  2. Step 2: Convert to fraction form
    20,279.70/30,398.90 = 13,706.55/x
  3. Step 3: Cross multiply
    20,279.70x = 30,398.90 × 13,706.55
  4. Step 4: Simplify right side
    20,279.70x = 416,663,974.26
  5. Step 5: Solve for x
    x = 416,663,974.26/20,279.70
  6. Step 6: Final answer
    x = 20,545.86

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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.