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Finding the Fourth Proportional to 12,245.29, 16,868.51 and 8,878.21

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Solution

The fourth proportional to 12,245.29, 16,868.51 and 8,878.21 is: 12,230.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,245.29 : 16,868.51 = 8,878.21 : x
  2. Step 2: Convert to fraction form
    12,245.29/16,868.51 = 8,878.21/x
  3. Step 3: Cross multiply
    12,245.29x = 16,868.51 × 8,878.21
  4. Step 4: Simplify right side
    12,245.29x = 149,762,129.78
  5. Step 5: Solve for x
    x = 149,762,129.78/12,245.29
  6. Step 6: Final answer
    x = 12,230.18

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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.