Home / 21,781.23-30,067.29-14,717.22

Finding the Fourth Proportional to 21,781.23, 30,067.29 and 14,717.22

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Solution

The fourth proportional to 21,781.23, 30,067.29 and 14,717.22 is: 20,315.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.23 : 30,067.29 = 14,717.22 : x
  2. Step 2: Convert to fraction form
    21,781.23/30,067.29 = 14,717.22/x
  3. Step 3: Cross multiply
    21,781.23x = 30,067.29 × 14,717.22
  4. Step 4: Simplify right side
    21,781.23x = 442,506,921.73
  5. Step 5: Solve for x
    x = 442,506,921.73/21,781.23
  6. Step 6: Final answer
    x = 20,315.97

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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.