Home / 31,851.68-43,977.20-19,920.80

Finding the Fourth Proportional to 31,851.68, 43,977.20 and 19,920.80

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Solution

The fourth proportional to 31,851.68, 43,977.20 and 19,920.80 is: 27,504.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,851.68 : 43,977.20 = 19,920.80 : x
  2. Step 2: Convert to fraction form
    31,851.68/43,977.20 = 19,920.80/x
  3. Step 3: Cross multiply
    31,851.68x = 43,977.20 × 19,920.80
  4. Step 4: Simplify right side
    31,851.68x = 876,061,005.76
  5. Step 5: Solve for x
    x = 876,061,005.76/31,851.68
  6. Step 6: Final answer
    x = 27,504.39

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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.