Home / 20,781.44-28,667.68-14,067.36

Finding the Fourth Proportional to 20,781.44, 28,667.68 and 14,067.36

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Solution

The fourth proportional to 20,781.44, 28,667.68 and 14,067.36 is: 19,405.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.44 : 28,667.68 = 14,067.36 : x
  2. Step 2: Convert to fraction form
    20,781.44/28,667.68 = 14,067.36/x
  3. Step 3: Cross multiply
    20,781.44x = 28,667.68 × 14,067.36
  4. Step 4: Simplify right side
    20,781.44x = 403,278,574.92
  5. Step 5: Solve for x
    x = 403,278,574.92/20,781.44
  6. Step 6: Final answer
    x = 19,405.71

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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.