Home / 22,720.38-31,353.75-13,290.54

Finding the Fourth Proportional to 22,720.38, 31,353.75 and 13,290.54

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Solution

The fourth proportional to 22,720.38, 31,353.75 and 13,290.54 is: 18,340.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,720.38 : 31,353.75 = 13,290.54 : x
  2. Step 2: Convert to fraction form
    22,720.38/31,353.75 = 13,290.54/x
  3. Step 3: Cross multiply
    22,720.38x = 31,353.75 × 13,290.54
  4. Step 4: Simplify right side
    22,720.38x = 416,708,268.53
  5. Step 5: Solve for x
    x = 416,708,268.53/22,720.38
  6. Step 6: Final answer
    x = 18,340.73

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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.