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Finding the Fourth Proportional to 8,468, 11,685.84 and 4,742

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Solution

The fourth proportional to 8,468, 11,685.84 and 4,742 is: 6,543.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,468 : 11,685.84 = 4,742 : x
  2. Step 2: Convert to fraction form
    8,468/11,685.84 = 4,742/x
  3. Step 3: Cross multiply
    8,468x = 11,685.84 × 4,742
  4. Step 4: Simplify right side
    8,468x = 55,414,253.28
  5. Step 5: Solve for x
    x = 55,414,253.28/8,468
  6. Step 6: Final answer
    x = 6,543.96

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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.