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Finding the Fourth Proportional to 12,616.02, 18,918.12 and 4,293.78

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Solution

The fourth proportional to 12,616.02, 18,918.12 and 4,293.78 is: 6,438.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,616.02 : 18,918.12 = 4,293.78 : x
  2. Step 2: Convert to fraction form
    12,616.02/18,918.12 = 4,293.78/x
  3. Step 3: Cross multiply
    12,616.02x = 18,918.12 × 4,293.78
  4. Step 4: Simplify right side
    12,616.02x = 81,230,245.29
  5. Step 5: Solve for x
    x = 81,230,245.29/12,616.02
  6. Step 6: Final answer
    x = 6,438.66

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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.