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Finding the Fourth Proportional to 20,172.60, 30,201.30 and 17,868.60

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Solution

The fourth proportional to 20,172.60, 30,201.30 and 17,868.60 is: 26,751.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.60 : 30,201.30 = 17,868.60 : x
  2. Step 2: Convert to fraction form
    20,172.60/30,201.30 = 17,868.60/x
  3. Step 3: Cross multiply
    20,172.60x = 30,201.30 × 17,868.60
  4. Step 4: Simplify right side
    20,172.60x = 539,654,949.18
  5. Step 5: Solve for x
    x = 539,654,949.18/20,172.60
  6. Step 6: Final answer
    x = 26,751.88

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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.