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Finding the Fourth Proportional to 12,892.28, 17,785.02 and 8,413.96

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Solution

The fourth proportional to 12,892.28, 17,785.02 and 8,413.96 is: 11,607.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,892.28 : 17,785.02 = 8,413.96 : x
  2. Step 2: Convert to fraction form
    12,892.28/17,785.02 = 8,413.96/x
  3. Step 3: Cross multiply
    12,892.28x = 17,785.02 × 8,413.96
  4. Step 4: Simplify right side
    12,892.28x = 149,642,446.88
  5. Step 5: Solve for x
    x = 149,642,446.88/12,892.28
  6. Step 6: Final answer
    x = 11,607.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.