Home / 31,844.28-43,965-20,519.40

Finding the Fourth Proportional to 31,844.28, 43,965 and 20,519.40

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Solution

The fourth proportional to 31,844.28, 43,965 and 20,519.40 is: 28,329.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,844.28 : 43,965 = 20,519.40 : x
  2. Step 2: Convert to fraction form
    31,844.28/43,965 = 20,519.40/x
  3. Step 3: Cross multiply
    31,844.28x = 43,965 × 20,519.40
  4. Step 4: Simplify right side
    31,844.28x = 902,135,421.00
  5. Step 5: Solve for x
    x = 902,135,421.00/31,844.28
  6. Step 6: Final answer
    x = 28,329.59

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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.