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Finding the Fourth Proportional to 12,843.90, 19,265.85 and 9,927.90

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Solution

The fourth proportional to 12,843.90, 19,265.85 and 9,927.90 is: 14,891.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,843.90 : 19,265.85 = 9,927.90 : x
  2. Step 2: Convert to fraction form
    12,843.90/19,265.85 = 9,927.90/x
  3. Step 3: Cross multiply
    12,843.90x = 19,265.85 × 9,927.90
  4. Step 4: Simplify right side
    12,843.90x = 191,269,432.22
  5. Step 5: Solve for x
    x = 191,269,432.22/12,843.90
  6. Step 6: Final answer
    x = 14,891.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.