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Finding the Fourth Proportional to 20,288.60, 30,432.90 and 16,832.60

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Solution

The fourth proportional to 20,288.60, 30,432.90 and 16,832.60 is: 25,248.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.60 : 30,432.90 = 16,832.60 : x
  2. Step 2: Convert to fraction form
    20,288.60/30,432.90 = 16,832.60/x
  3. Step 3: Cross multiply
    20,288.60x = 30,432.90 × 16,832.60
  4. Step 4: Simplify right side
    20,288.60x = 512,264,832.54
  5. Step 5: Solve for x
    x = 512,264,832.54/20,288.60
  6. Step 6: Final answer
    x = 25,248.90

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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.