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Finding the Fourth Proportional to 20,223.80, 30,335.70 and 18,279.80

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Solution

The fourth proportional to 20,223.80, 30,335.70 and 18,279.80 is: 27,419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,223.80 : 30,335.70 = 18,279.80 : x
  2. Step 2: Convert to fraction form
    20,223.80/30,335.70 = 18,279.80/x
  3. Step 3: Cross multiply
    20,223.80x = 30,335.70 × 18,279.80
  4. Step 4: Simplify right side
    20,223.80x = 554,530,528.86
  5. Step 5: Solve for x
    x = 554,530,528.86/20,223.80
  6. Step 6: Final answer
    x = 27,419.70

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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.