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Finding the Fourth Proportional to 12,856.86, 17,755.11 and 8,888.22

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Solution

The fourth proportional to 12,856.86, 17,755.11 and 8,888.22 is: 12,274.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,856.86 : 17,755.11 = 8,888.22 : x
  2. Step 2: Convert to fraction form
    12,856.86/17,755.11 = 8,888.22/x
  3. Step 3: Cross multiply
    12,856.86x = 17,755.11 × 8,888.22
  4. Step 4: Simplify right side
    12,856.86x = 157,811,323.80
  5. Step 5: Solve for x
    x = 157,811,323.80/12,856.86
  6. Step 6: Final answer
    x = 12,274.48

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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.