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Finding the Fourth Proportional to 12,616.80, 18,813.72 and 12,504.24

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Solution

The fourth proportional to 12,616.80, 18,813.72 and 12,504.24 is: 18,645.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,616.80 : 18,813.72 = 12,504.24 : x
  2. Step 2: Convert to fraction form
    12,616.80/18,813.72 = 12,504.24/x
  3. Step 3: Cross multiply
    12,616.80x = 18,813.72 × 12,504.24
  4. Step 4: Simplify right side
    12,616.80x = 235,251,270.17
  5. Step 5: Solve for x
    x = 235,251,270.17/12,616.80
  6. Step 6: Final answer
    x = 18,645.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.