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Finding the Fourth Proportional to 20,334.80, 30,502.20 and 18,220.70

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Solution

The fourth proportional to 20,334.80, 30,502.20 and 18,220.70 is: 27,331.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,334.80 : 30,502.20 = 18,220.70 : x
  2. Step 2: Convert to fraction form
    20,334.80/30,502.20 = 18,220.70/x
  3. Step 3: Cross multiply
    20,334.80x = 30,502.20 × 18,220.70
  4. Step 4: Simplify right side
    20,334.80x = 555,771,435.54
  5. Step 5: Solve for x
    x = 555,771,435.54/20,334.80
  6. Step 6: Final answer
    x = 27,331.05

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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.