Home / 21,781.50-30,067.68-14,717.49

Finding the Fourth Proportional to 21,781.50, 30,067.68 and 14,717.49

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Solution

The fourth proportional to 21,781.50, 30,067.68 and 14,717.49 is: 20,316.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.50 : 30,067.68 = 14,717.49 : x
  2. Step 2: Convert to fraction form
    21,781.50/30,067.68 = 14,717.49/x
  3. Step 3: Cross multiply
    21,781.50x = 30,067.68 × 14,717.49
  4. Step 4: Simplify right side
    21,781.50x = 442,520,779.72
  5. Step 5: Solve for x
    x = 442,520,779.72/21,781.50
  6. Step 6: Final answer
    x = 20,316.36

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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.