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Finding the Fourth Proportional to 8,912.66, 13,371.93 and 2,990.12

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Solution

The fourth proportional to 8,912.66, 13,371.93 and 2,990.12 is: 4,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.66 : 13,371.93 = 2,990.12 : x
  2. Step 2: Convert to fraction form
    8,912.66/13,371.93 = 2,990.12/x
  3. Step 3: Cross multiply
    8,912.66x = 13,371.93 × 2,990.12
  4. Step 4: Simplify right side
    8,912.66x = 39,983,608.47
  5. Step 5: Solve for x
    x = 39,983,608.47/8,912.66
  6. Step 6: Final answer
    x = 4,486.16

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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.