Home / 38,641.20-57,980.40-18,909

Finding the Fourth Proportional to 38,641.20, 57,980.40 and 18,909

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Solution

The fourth proportional to 38,641.20, 57,980.40 and 18,909 is: 28,372.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,641.20 : 57,980.40 = 18,909 : x
  2. Step 2: Convert to fraction form
    38,641.20/57,980.40 = 18,909/x
  3. Step 3: Cross multiply
    38,641.20x = 57,980.40 × 18,909
  4. Step 4: Simplify right side
    38,641.20x = 1,096,351,383.60
  5. Step 5: Solve for x
    x = 1,096,351,383.60/38,641.20
  6. Step 6: Final answer
    x = 28,372.60

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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.