Home / 20,295.28-28,007.42-11,342.78

Finding the Fourth Proportional to 20,295.28, 28,007.42 and 11,342.78

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Solution

The fourth proportional to 20,295.28, 28,007.42 and 11,342.78 is: 15,652.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.28 : 28,007.42 = 11,342.78 : x
  2. Step 2: Convert to fraction form
    20,295.28/28,007.42 = 11,342.78/x
  3. Step 3: Cross multiply
    20,295.28x = 28,007.42 × 11,342.78
  4. Step 4: Simplify right side
    20,295.28x = 317,681,806.68
  5. Step 5: Solve for x
    x = 317,681,806.68/20,295.28
  6. Step 6: Final answer
    x = 15,652.99

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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.