Home / 31,727.78-43,764.49-20,412.01

Finding the Fourth Proportional to 31,727.78, 43,764.49 and 20,412.01

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Solution

The fourth proportional to 31,727.78, 43,764.49 and 20,412.01 is: 28,155.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,727.78 : 43,764.49 = 20,412.01 : x
  2. Step 2: Convert to fraction form
    31,727.78/43,764.49 = 20,412.01/x
  3. Step 3: Cross multiply
    31,727.78x = 43,764.49 × 20,412.01
  4. Step 4: Simplify right side
    31,727.78x = 893,321,207.52
  5. Step 5: Solve for x
    x = 893,321,207.52/31,727.78
  6. Step 6: Final answer
    x = 28,155.81

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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.