Home / 20,453.85-28,227.69-15,409.17

Finding the Fourth Proportional to 20,453.85, 28,227.69 and 15,409.17

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Solution

The fourth proportional to 20,453.85, 28,227.69 and 15,409.17 is: 21,265.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453.85 : 28,227.69 = 15,409.17 : x
  2. Step 2: Convert to fraction form
    20,453.85/28,227.69 = 15,409.17/x
  3. Step 3: Cross multiply
    20,453.85x = 28,227.69 × 15,409.17
  4. Step 4: Simplify right side
    20,453.85x = 434,965,273.92
  5. Step 5: Solve for x
    x = 434,965,273.92/20,453.85
  6. Step 6: Final answer
    x = 21,265.69

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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.