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Finding the Fourth Proportional to 8,964.78, 13,447.09 and 2,391.49

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Solution

The fourth proportional to 8,964.78, 13,447.09 and 2,391.49 is: 3,587.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,964.78 : 13,447.09 = 2,391.49 : x
  2. Step 2: Convert to fraction form
    8,964.78/13,447.09 = 2,391.49/x
  3. Step 3: Cross multiply
    8,964.78x = 13,447.09 × 2,391.49
  4. Step 4: Simplify right side
    8,964.78x = 32,158,581.26
  5. Step 5: Solve for x
    x = 32,158,581.26/8,964.78
  6. Step 6: Final answer
    x = 3,587.21

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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.