Home / 21,826.80-30,135.24-16,781.72

Finding the Fourth Proportional to 21,826.80, 30,135.24 and 16,781.72

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Solution

The fourth proportional to 21,826.80, 30,135.24 and 16,781.72 is: 23,169.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,826.80 : 30,135.24 = 16,781.72 : x
  2. Step 2: Convert to fraction form
    21,826.80/30,135.24 = 16,781.72/x
  3. Step 3: Cross multiply
    21,826.80x = 30,135.24 × 16,781.72
  4. Step 4: Simplify right side
    21,826.80x = 505,721,009.14
  5. Step 5: Solve for x
    x = 505,721,009.14/21,826.80
  6. Step 6: Final answer
    x = 23,169.73

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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.