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Finding the Fourth Proportional to 15,821.41, 21,833.44 and 8,651.46

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Solution

The fourth proportional to 15,821.41, 21,833.44 and 8,651.46 is: 11,938.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.41 : 21,833.44 = 8,651.46 : x
  2. Step 2: Convert to fraction form
    15,821.41/21,833.44 = 8,651.46/x
  3. Step 3: Cross multiply
    15,821.41x = 21,833.44 × 8,651.46
  4. Step 4: Simplify right side
    15,821.41x = 188,891,196.25
  5. Step 5: Solve for x
    x = 188,891,196.25/15,821.41
  6. Step 6: Final answer
    x = 11,938.96

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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.