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Finding the Fourth Proportional to 18,987.67, 28,481.95 and 6,507.59

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Solution

The fourth proportional to 18,987.67, 28,481.95 and 6,507.59 is: 9,761.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.67 : 28,481.95 = 6,507.59 : x
  2. Step 2: Convert to fraction form
    18,987.67/28,481.95 = 6,507.59/x
  3. Step 3: Cross multiply
    18,987.67x = 28,481.95 × 6,507.59
  4. Step 4: Simplify right side
    18,987.67x = 185,348,842.33
  5. Step 5: Solve for x
    x = 185,348,842.33/18,987.67
  6. Step 6: Final answer
    x = 9,761.54

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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.