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Finding the Fourth Proportional to 8,757.84, 13,137.66 and 2,912.88

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Solution

The fourth proportional to 8,757.84, 13,137.66 and 2,912.88 is: 4,369.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.84 : 13,137.66 = 2,912.88 : x
  2. Step 2: Convert to fraction form
    8,757.84/13,137.66 = 2,912.88/x
  3. Step 3: Cross multiply
    8,757.84x = 13,137.66 × 2,912.88
  4. Step 4: Simplify right side
    8,757.84x = 38,268,427.06
  5. Step 5: Solve for x
    x = 38,268,427.06/8,757.84
  6. Step 6: Final answer
    x = 4,369.62

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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.