Home / 20,517.11-28,313.64-11,085.69

Finding the Fourth Proportional to 20,517.11, 28,313.64 and 11,085.69

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Solution

The fourth proportional to 20,517.11, 28,313.64 and 11,085.69 is: 15,298.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.11 : 28,313.64 = 11,085.69 : x
  2. Step 2: Convert to fraction form
    20,517.11/28,313.64 = 11,085.69/x
  3. Step 3: Cross multiply
    20,517.11x = 28,313.64 × 11,085.69
  4. Step 4: Simplify right side
    20,517.11x = 313,876,235.81
  5. Step 5: Solve for x
    x = 313,876,235.81/20,517.11
  6. Step 6: Final answer
    x = 15,298.27

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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.