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Finding the Fourth Proportional to 25,652.40, 38,478.60 and 8,122.20

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Solution

The fourth proportional to 25,652.40, 38,478.60 and 8,122.20 is: 12,183.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,652.40 : 38,478.60 = 8,122.20 : x
  2. Step 2: Convert to fraction form
    25,652.40/38,478.60 = 8,122.20/x
  3. Step 3: Cross multiply
    25,652.40x = 38,478.60 × 8,122.20
  4. Step 4: Simplify right side
    25,652.40x = 312,530,884.92
  5. Step 5: Solve for x
    x = 312,530,884.92/25,652.40
  6. Step 6: Final answer
    x = 12,183.30

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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.