Home / 20,785.23-31,114.80-13,394.97

Finding the Fourth Proportional to 20,785.23, 31,114.80 and 13,394.97

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Solution

The fourth proportional to 20,785.23, 31,114.80 and 13,394.97 is: 20,051.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.23 : 31,114.80 = 13,394.97 : x
  2. Step 2: Convert to fraction form
    20,785.23/31,114.80 = 13,394.97/x
  3. Step 3: Cross multiply
    20,785.23x = 31,114.80 × 13,394.97
  4. Step 4: Simplify right side
    20,785.23x = 416,781,812.56
  5. Step 5: Solve for x
    x = 416,781,812.56/20,785.23
  6. Step 6: Final answer
    x = 20,051.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.