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Finding the Fourth Proportional to 12,616.20, 18,924.30 and 12,400.20

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Solution

The fourth proportional to 12,616.20, 18,924.30 and 12,400.20 is: 18,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,616.20 : 18,924.30 = 12,400.20 : x
  2. Step 2: Convert to fraction form
    12,616.20/18,924.30 = 12,400.20/x
  3. Step 3: Cross multiply
    12,616.20x = 18,924.30 × 12,400.20
  4. Step 4: Simplify right side
    12,616.20x = 234,665,104.86
  5. Step 5: Solve for x
    x = 234,665,104.86/12,616.20
  6. Step 6: Final answer
    x = 18,600.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.