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Finding the Fourth Proportional to 15,843.30, 21,863.48 and 8,769.57

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Solution

The fourth proportional to 15,843.30, 21,863.48 and 8,769.57 is: 12,101.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843.30 : 21,863.48 = 8,769.57 : x
  2. Step 2: Convert to fraction form
    15,843.30/21,863.48 = 8,769.57/x
  3. Step 3: Cross multiply
    15,843.30x = 21,863.48 × 8,769.57
  4. Step 4: Simplify right side
    15,843.30x = 191,733,208.99
  5. Step 5: Solve for x
    x = 191,733,208.99/15,843.30
  6. Step 6: Final answer
    x = 12,101.85

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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.