Home / 20,366.21-28,105.71-11,415.71

Finding the Fourth Proportional to 20,366.21, 28,105.71 and 11,415.71

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Solution

The fourth proportional to 20,366.21, 28,105.71 and 11,415.71 is: 15,753.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,366.21 : 28,105.71 = 11,415.71 : x
  2. Step 2: Convert to fraction form
    20,366.21/28,105.71 = 11,415.71/x
  3. Step 3: Cross multiply
    20,366.21x = 28,105.71 × 11,415.71
  4. Step 4: Simplify right side
    20,366.21x = 320,846,634.70
  5. Step 5: Solve for x
    x = 320,846,634.70/20,366.21
  6. Step 6: Final answer
    x = 15,753.87

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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.