Home / 18,115.12-24,987.36-13,086.73

Finding the Fourth Proportional to 18,115.12, 24,987.36 and 13,086.73

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Solution

The fourth proportional to 18,115.12, 24,987.36 and 13,086.73 is: 18,051.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.12 : 24,987.36 = 13,086.73 : x
  2. Step 2: Convert to fraction form
    18,115.12/24,987.36 = 13,086.73/x
  3. Step 3: Cross multiply
    18,115.12x = 24,987.36 × 13,086.73
  4. Step 4: Simplify right side
    18,115.12x = 327,002,833.73
  5. Step 5: Solve for x
    x = 327,002,833.73/18,115.12
  6. Step 6: Final answer
    x = 18,051.38

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Half scale
Find fourth proportional to 36,230.24, 49,974.72 and 26,173.46
Double scale
Find fourth proportional to 18,116.12, 24,988.74 and 13,087.73
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.