Home / 20,749.76-28,634.40-11,318.12

Finding the Fourth Proportional to 20,749.76, 28,634.40 and 11,318.12

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Solution

The fourth proportional to 20,749.76, 28,634.40 and 11,318.12 is: 15,618.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.76 : 28,634.40 = 11,318.12 : x
  2. Step 2: Convert to fraction form
    20,749.76/28,634.40 = 11,318.12/x
  3. Step 3: Cross multiply
    20,749.76x = 28,634.40 × 11,318.12
  4. Step 4: Simplify right side
    20,749.76x = 324,087,575.33
  5. Step 5: Solve for x
    x = 324,087,575.33/20,749.76
  6. Step 6: Final answer
    x = 15,618.86

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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.