Home / 38,430.20-57,651.60-12,128.60

Finding the Fourth Proportional to 38,430.20, 57,651.60 and 12,128.60

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Solution

The fourth proportional to 38,430.20, 57,651.60 and 12,128.60 is: 18,194.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,430.20 : 57,651.60 = 12,128.60 : x
  2. Step 2: Convert to fraction form
    38,430.20/57,651.60 = 12,128.60/x
  3. Step 3: Cross multiply
    38,430.20x = 57,651.60 × 12,128.60
  4. Step 4: Simplify right side
    38,430.20x = 699,233,195.76
  5. Step 5: Solve for x
    x = 699,233,195.76/38,430.20
  6. Step 6: Final answer
    x = 18,194.89

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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.