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Finding the Fourth Proportional to 38,189.60, 57,289.80 and 11,891.60

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Solution

The fourth proportional to 38,189.60, 57,289.80 and 11,891.60 is: 17,839.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,189.60 : 57,289.80 = 11,891.60 : x
  2. Step 2: Convert to fraction form
    38,189.60/57,289.80 = 11,891.60/x
  3. Step 3: Cross multiply
    38,189.60x = 57,289.80 × 11,891.60
  4. Step 4: Simplify right side
    38,189.60x = 681,267,385.68
  5. Step 5: Solve for x
    x = 681,267,385.68/38,189.60
  6. Step 6: Final answer
    x = 17,839.08

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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.