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Finding the Fourth Proportional to 12,876.44, 17,778.02 and 9,886.91

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Solution

The fourth proportional to 12,876.44, 17,778.02 and 9,886.91 is: 13,650.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.44 : 17,778.02 = 9,886.91 : x
  2. Step 2: Convert to fraction form
    12,876.44/17,778.02 = 9,886.91/x
  3. Step 3: Cross multiply
    12,876.44x = 17,778.02 × 9,886.91
  4. Step 4: Simplify right side
    12,876.44x = 175,769,545.39
  5. Step 5: Solve for x
    x = 175,769,545.39/12,876.44
  6. Step 6: Final answer
    x = 13,650.48

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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.