Home / 38,428.20-57,648.60-12,126.60

Finding the Fourth Proportional to 38,428.20, 57,648.60 and 12,126.60

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Solution

The fourth proportional to 38,428.20, 57,648.60 and 12,126.60 is: 18,191.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,428.20 : 57,648.60 = 12,126.60 : x
  2. Step 2: Convert to fraction form
    38,428.20/57,648.60 = 12,126.60/x
  3. Step 3: Cross multiply
    38,428.20x = 57,648.60 × 12,126.60
  4. Step 4: Simplify right side
    38,428.20x = 699,081,512.76
  5. Step 5: Solve for x
    x = 699,081,512.76/38,428.20
  6. Step 6: Final answer
    x = 18,191.89

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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.