Home / 20,309.45-28,027.17-11,357.78

Finding the Fourth Proportional to 20,309.45, 28,027.17 and 11,357.78

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Solution

The fourth proportional to 20,309.45, 28,027.17 and 11,357.78 is: 15,673.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.45 : 28,027.17 = 11,357.78 : x
  2. Step 2: Convert to fraction form
    20,309.45/28,027.17 = 11,357.78/x
  3. Step 3: Cross multiply
    20,309.45x = 28,027.17 × 11,357.78
  4. Step 4: Simplify right side
    20,309.45x = 318,326,290.75
  5. Step 5: Solve for x
    x = 318,326,290.75/20,309.45
  6. Step 6: Final answer
    x = 15,673.81

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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.