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Finding the Fourth Proportional to 12,246.80, 16,894.80 and 8,269.20

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Solution

The fourth proportional to 12,246.80, 16,894.80 and 8,269.20 is: 11,407.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,246.80 : 16,894.80 = 8,269.20 : x
  2. Step 2: Convert to fraction form
    12,246.80/16,894.80 = 8,269.20/x
  3. Step 3: Cross multiply
    12,246.80x = 16,894.80 × 8,269.20
  4. Step 4: Simplify right side
    12,246.80x = 139,706,480.16
  5. Step 5: Solve for x
    x = 139,706,480.16/12,246.80
  6. Step 6: Final answer
    x = 11,407.59

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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.