Home / 12,003.26-18,005.15-9,539.78

Finding the Fourth Proportional to 12,003.26, 18,005.15 and 9,539.78

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Solution

The fourth proportional to 12,003.26, 18,005.15 and 9,539.78 is: 14,309.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,003.26 : 18,005.15 = 9,539.78 : x
  2. Step 2: Convert to fraction form
    12,003.26/18,005.15 = 9,539.78/x
  3. Step 3: Cross multiply
    12,003.26x = 18,005.15 × 9,539.78
  4. Step 4: Simplify right side
    12,003.26x = 171,765,103.69
  5. Step 5: Solve for x
    x = 171,765,103.69/12,003.26
  6. Step 6: Final answer
    x = 14,309.88

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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.