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Finding the Fourth Proportional to 20,327.60, 30,491.40 and 20,133.20

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Solution

The fourth proportional to 20,327.60, 30,491.40 and 20,133.20 is: 30,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,327.60 : 30,491.40 = 20,133.20 : x
  2. Step 2: Convert to fraction form
    20,327.60/30,491.40 = 20,133.20/x
  3. Step 3: Cross multiply
    20,327.60x = 30,491.40 × 20,133.20
  4. Step 4: Simplify right side
    20,327.60x = 613,889,454.48
  5. Step 5: Solve for x
    x = 613,889,454.48/20,327.60
  6. Step 6: Final answer
    x = 30,199.80

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Similar ratio
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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.