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Finding the Fourth Proportional to 20,373.20, 30,559.80 and 20,243.60

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Solution

The fourth proportional to 20,373.20, 30,559.80 and 20,243.60 is: 30,365.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.20 : 30,559.80 = 20,243.60 : x
  2. Step 2: Convert to fraction form
    20,373.20/30,559.80 = 20,243.60/x
  3. Step 3: Cross multiply
    20,373.20x = 30,559.80 × 20,243.60
  4. Step 4: Simplify right side
    20,373.20x = 618,640,367.28
  5. Step 5: Solve for x
    x = 618,640,367.28/20,373.20
  6. Step 6: Final answer
    x = 30,365.40

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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.