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Finding the Fourth Proportional to 32,652.80, 48,979.20 and 20,211.20

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Solution

The fourth proportional to 32,652.80, 48,979.20 and 20,211.20 is: 30,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,652.80 : 48,979.20 = 20,211.20 : x
  2. Step 2: Convert to fraction form
    32,652.80/48,979.20 = 20,211.20/x
  3. Step 3: Cross multiply
    32,652.80x = 48,979.20 × 20,211.20
  4. Step 4: Simplify right side
    32,652.80x = 989,928,407.04
  5. Step 5: Solve for x
    x = 989,928,407.04/32,652.80
  6. Step 6: Final answer
    x = 30,316.80

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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.