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Finding the Fourth Proportional to 20,350.40, 30,525.60 and 20,220.80

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Solution

The fourth proportional to 20,350.40, 30,525.60 and 20,220.80 is: 30,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.40 : 30,525.60 = 20,220.80 : x
  2. Step 2: Convert to fraction form
    20,350.40/30,525.60 = 20,220.80/x
  3. Step 3: Cross multiply
    20,350.40x = 30,525.60 × 20,220.80
  4. Step 4: Simplify right side
    20,350.40x = 617,252,052.48
  5. Step 5: Solve for x
    x = 617,252,052.48/20,350.40
  6. Step 6: Final answer
    x = 30,331.20

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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.