Home / 18,987.30-28,481.40-5,839.79

Finding the Fourth Proportional to 18,987.30, 28,481.40 and 5,839.79

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Solution

The fourth proportional to 18,987.30, 28,481.40 and 5,839.79 is: 8,759.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.30 : 28,481.40 = 5,839.79 : x
  2. Step 2: Convert to fraction form
    18,987.30/28,481.40 = 5,839.79/x
  3. Step 3: Cross multiply
    18,987.30x = 28,481.40 × 5,839.79
  4. Step 4: Simplify right side
    18,987.30x = 166,325,394.91
  5. Step 5: Solve for x
    x = 166,325,394.91/18,987.30
  6. Step 6: Final answer
    x = 8,759.82

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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.