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Finding the Fourth Proportional to 20,199.70, 30,331.95 and 13,654.90

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Solution

The fourth proportional to 20,199.70, 30,331.95 and 13,654.90 is: 20,504.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199.70 : 30,331.95 = 13,654.90 : x
  2. Step 2: Convert to fraction form
    20,199.70/30,331.95 = 13,654.90/x
  3. Step 3: Cross multiply
    20,199.70x = 30,331.95 × 13,654.90
  4. Step 4: Simplify right side
    20,199.70x = 414,179,744.06
  5. Step 5: Solve for x
    x = 414,179,744.06/20,199.70
  6. Step 6: Final answer
    x = 20,504.25

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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.