Home / 20,279.42-30,355.41-12,892.22

Finding the Fourth Proportional to 20,279.42, 30,355.41 and 12,892.22

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Solution

The fourth proportional to 20,279.42, 30,355.41 and 12,892.22 is: 19,297.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.42 : 30,355.41 = 12,892.22 : x
  2. Step 2: Convert to fraction form
    20,279.42/30,355.41 = 12,892.22/x
  3. Step 3: Cross multiply
    20,279.42x = 30,355.41 × 12,892.22
  4. Step 4: Simplify right side
    20,279.42x = 391,348,623.91
  5. Step 5: Solve for x
    x = 391,348,623.91/20,279.42
  6. Step 6: Final answer
    x = 19,297.82

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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.