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Finding the Fourth Proportional to 21,948.60, 32,922.90 and 20,134.20

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Solution

The fourth proportional to 21,948.60, 32,922.90 and 20,134.20 is: 30,201.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,948.60 : 32,922.90 = 20,134.20 : x
  2. Step 2: Convert to fraction form
    21,948.60/32,922.90 = 20,134.20/x
  3. Step 3: Cross multiply
    21,948.60x = 32,922.90 × 20,134.20
  4. Step 4: Simplify right side
    21,948.60x = 662,876,253.18
  5. Step 5: Solve for x
    x = 662,876,253.18/21,948.60
  6. Step 6: Final answer
    x = 30,201.30

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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.