Home / 15,821.80-21,833.20-8,747.75

Finding the Fourth Proportional to 15,821.80, 21,833.20 and 8,747.75

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Solution

The fourth proportional to 15,821.80, 21,833.20 and 8,747.75 is: 12,071.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.80 : 21,833.20 = 8,747.75 : x
  2. Step 2: Convert to fraction form
    15,821.80/21,833.20 = 8,747.75/x
  3. Step 3: Cross multiply
    15,821.80x = 21,833.20 × 8,747.75
  4. Step 4: Simplify right side
    15,821.80x = 190,991,375.30
  5. Step 5: Solve for x
    x = 190,991,375.30/15,821.80
  6. Step 6: Final answer
    x = 12,071.41

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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.