Home / 20,458.28-28,232.46-11,505.86

Finding the Fourth Proportional to 20,458.28, 28,232.46 and 11,505.86

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Solution

The fourth proportional to 20,458.28, 28,232.46 and 11,505.86 is: 15,878.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.28 : 28,232.46 = 11,505.86 : x
  2. Step 2: Convert to fraction form
    20,458.28/28,232.46 = 11,505.86/x
  3. Step 3: Cross multiply
    20,458.28x = 28,232.46 × 11,505.86
  4. Step 4: Simplify right side
    20,458.28x = 324,838,732.22
  5. Step 5: Solve for x
    x = 324,838,732.22/20,458.28
  6. Step 6: Final answer
    x = 15,878.11

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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.