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Finding the Fourth Proportional to 12,617.13, 18,904.35 and 8,912.73

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Solution

The fourth proportional to 12,617.13, 18,904.35 and 8,912.73 is: 13,354.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.13 : 18,904.35 = 8,912.73 : x
  2. Step 2: Convert to fraction form
    12,617.13/18,904.35 = 8,912.73/x
  3. Step 3: Cross multiply
    12,617.13x = 18,904.35 × 8,912.73
  4. Step 4: Simplify right side
    12,617.13x = 168,489,367.38
  5. Step 5: Solve for x
    x = 168,489,367.38/12,617.13
  6. Step 6: Final answer
    x = 13,354.02

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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.