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Finding the Fourth Proportional to 8,912.75, 12,299.63 and 5,376.11

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Solution

The fourth proportional to 8,912.75, 12,299.63 and 5,376.11 is: 7,419.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.75 : 12,299.63 = 5,376.11 : x
  2. Step 2: Convert to fraction form
    8,912.75/12,299.63 = 5,376.11/x
  3. Step 3: Cross multiply
    8,912.75x = 12,299.63 × 5,376.11
  4. Step 4: Simplify right side
    8,912.75x = 66,124,163.84
  5. Step 5: Solve for x
    x = 66,124,163.84/8,912.75
  6. Step 6: Final answer
    x = 7,419.05

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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.