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Finding the Fourth Proportional to 12,617.02, 18,919.62 and 4,294.78

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Solution

The fourth proportional to 12,617.02, 18,919.62 and 4,294.78 is: 6,440.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.02 : 18,919.62 = 4,294.78 : x
  2. Step 2: Convert to fraction form
    12,617.02/18,919.62 = 4,294.78/x
  3. Step 3: Cross multiply
    12,617.02x = 18,919.62 × 4,294.78
  4. Step 4: Simplify right side
    12,617.02x = 81,255,605.58
  5. Step 5: Solve for x
    x = 81,255,605.58/12,617.02
  6. Step 6: Final answer
    x = 6,440.16

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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.