Home / 20,310.39-28,028.27-11,357.87

Finding the Fourth Proportional to 20,310.39, 28,028.27 and 11,357.87

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Solution

The fourth proportional to 20,310.39, 28,028.27 and 11,357.87 is: 15,673.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.39 : 28,028.27 = 11,357.87 : x
  2. Step 2: Convert to fraction form
    20,310.39/28,028.27 = 11,357.87/x
  3. Step 3: Cross multiply
    20,310.39x = 28,028.27 × 11,357.87
  4. Step 4: Simplify right side
    20,310.39x = 318,341,250.05
  5. Step 5: Solve for x
    x = 318,341,250.05/20,310.39
  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.