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Finding the Fourth Proportional to 18,691.20, 28,043.01 and 6,848.64

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Solution

The fourth proportional to 18,691.20, 28,043.01 and 6,848.64 is: 10,275.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.20 : 28,043.01 = 6,848.64 : x
  2. Step 2: Convert to fraction form
    18,691.20/28,043.01 = 6,848.64/x
  3. Step 3: Cross multiply
    18,691.20x = 28,043.01 × 6,848.64
  4. Step 4: Simplify right side
    18,691.20x = 192,056,480.01
  5. Step 5: Solve for x
    x = 192,056,480.01/18,691.20
  6. Step 6: Final answer
    x = 10,275.24

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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.