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Finding the Fourth Proportional to 20,331.60, 30,497.40 and 20,137.20

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Solution

The fourth proportional to 20,331.60, 30,497.40 and 20,137.20 is: 30,205.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.60 : 30,497.40 = 20,137.20 : x
  2. Step 2: Convert to fraction form
    20,331.60/30,497.40 = 20,137.20/x
  3. Step 3: Cross multiply
    20,331.60x = 30,497.40 × 20,137.20
  4. Step 4: Simplify right side
    20,331.60x = 614,132,243.28
  5. Step 5: Solve for x
    x = 614,132,243.28/20,331.60
  6. Step 6: Final answer
    x = 30,205.80

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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.