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Finding the Fourth Proportional to 8,986.06, 12,400.18 and 5,208.92

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Solution

The fourth proportional to 8,986.06, 12,400.18 and 5,208.92 is: 7,187.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.06 : 12,400.18 = 5,208.92 : x
  2. Step 2: Convert to fraction form
    8,986.06/12,400.18 = 5,208.92/x
  3. Step 3: Cross multiply
    8,986.06x = 12,400.18 × 5,208.92
  4. Step 4: Simplify right side
    8,986.06x = 64,591,545.61
  5. Step 5: Solve for x
    x = 64,591,545.61/8,986.06
  6. Step 6: Final answer
    x = 7,187.97

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