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Finding the Fourth Proportional to 12,290.55, 16,947.57 and 8,304.75

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Solution

The fourth proportional to 12,290.55, 16,947.57 and 8,304.75 is: 11,451.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,290.55 : 16,947.57 = 8,304.75 : x
  2. Step 2: Convert to fraction form
    12,290.55/16,947.57 = 8,304.75/x
  3. Step 3: Cross multiply
    12,290.55x = 16,947.57 × 8,304.75
  4. Step 4: Simplify right side
    12,290.55x = 140,745,331.96
  5. Step 5: Solve for x
    x = 140,745,331.96/12,290.55
  6. Step 6: Final answer
    x = 11,451.51

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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.