Home / 20,753.28-28,639.71-11,321.91

Finding the Fourth Proportional to 20,753.28, 28,639.71 and 11,321.91

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Solution

The fourth proportional to 20,753.28, 28,639.71 and 11,321.91 is: 15,624.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.28 : 28,639.71 = 11,321.91 : x
  2. Step 2: Convert to fraction form
    20,753.28/28,639.71 = 11,321.91/x
  3. Step 3: Cross multiply
    20,753.28x = 28,639.71 × 11,321.91
  4. Step 4: Simplify right side
    20,753.28x = 324,256,219.05
  5. Step 5: Solve for x
    x = 324,256,219.05/20,753.28
  6. Step 6: Final answer
    x = 15,624.34

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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.