Home / 31,821.84-43,877.91-20,321.26

Finding the Fourth Proportional to 31,821.84, 43,877.91 and 20,321.26

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Solution

The fourth proportional to 31,821.84, 43,877.91 and 20,321.26 is: 28,020.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,821.84 : 43,877.91 = 20,321.26 : x
  2. Step 2: Convert to fraction form
    31,821.84/43,877.91 = 20,321.26/x
  3. Step 3: Cross multiply
    31,821.84x = 43,877.91 × 20,321.26
  4. Step 4: Simplify right side
    31,821.84x = 891,654,231.47
  5. Step 5: Solve for x
    x = 891,654,231.47/31,821.84
  6. Step 6: Final answer
    x = 28,020.20

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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.