Home / 31,268.72-43,142.28-20,097.20

Finding the Fourth Proportional to 31,268.72, 43,142.28 and 20,097.20

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Solution

The fourth proportional to 31,268.72, 43,142.28 and 20,097.20 is: 27,728.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,268.72 : 43,142.28 = 20,097.20 : x
  2. Step 2: Convert to fraction form
    31,268.72/43,142.28 = 20,097.20/x
  3. Step 3: Cross multiply
    31,268.72x = 43,142.28 × 20,097.20
  4. Step 4: Simplify right side
    31,268.72x = 867,039,029.62
  5. Step 5: Solve for x
    x = 867,039,029.62/31,268.72
  6. Step 6: Final answer
    x = 27,728.64

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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.