Home / 20,828.27-28,734.89-13,273.20

Finding the Fourth Proportional to 20,828.27, 28,734.89 and 13,273.20

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Solution

The fourth proportional to 20,828.27, 28,734.89 and 13,273.20 is: 18,311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.27 : 28,734.89 = 13,273.20 : x
  2. Step 2: Convert to fraction form
    20,828.27/28,734.89 = 13,273.20/x
  3. Step 3: Cross multiply
    20,828.27x = 28,734.89 × 13,273.20
  4. Step 4: Simplify right side
    20,828.27x = 381,403,875.58
  5. Step 5: Solve for x
    x = 381,403,875.58/20,828.27
  6. Step 6: Final answer
    x = 18,311.83

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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.