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Finding the Fourth Proportional to 12,426.54, 18,639.80 and 8,519.10

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Solution

The fourth proportional to 12,426.54, 18,639.80 and 8,519.10 is: 12,778.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,426.54 : 18,639.80 = 8,519.10 : x
  2. Step 2: Convert to fraction form
    12,426.54/18,639.80 = 8,519.10/x
  3. Step 3: Cross multiply
    12,426.54x = 18,639.80 × 8,519.10
  4. Step 4: Simplify right side
    12,426.54x = 158,794,320.18
  5. Step 5: Solve for x
    x = 158,794,320.18/12,426.54
  6. Step 6: Final answer
    x = 12,778.64

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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.