Home / 20,449.36-28,229.61-15,415.62

Finding the Fourth Proportional to 20,449.36, 28,229.61 and 15,415.62

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Solution

The fourth proportional to 20,449.36, 28,229.61 and 15,415.62 is: 21,280.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.36 : 28,229.61 = 15,415.62 : x
  2. Step 2: Convert to fraction form
    20,449.36/28,229.61 = 15,415.62/x
  3. Step 3: Cross multiply
    20,449.36x = 28,229.61 × 15,415.62
  4. Step 4: Simplify right side
    20,449.36x = 435,176,892.46
  5. Step 5: Solve for x
    x = 435,176,892.46/20,449.36
  6. Step 6: Final answer
    x = 21,280.71

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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.