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Finding the Fourth Proportional to 18,723, 28,084.56 and 4,872

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Solution

The fourth proportional to 18,723, 28,084.56 and 4,872 is: 7,308.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723 : 28,084.56 = 4,872 : x
  2. Step 2: Convert to fraction form
    18,723/28,084.56 = 4,872/x
  3. Step 3: Cross multiply
    18,723x = 28,084.56 × 4,872
  4. Step 4: Simplify right side
    18,723x = 136,827,976.32
  5. Step 5: Solve for x
    x = 136,827,976.32/18,723
  6. Step 6: Final answer
    x = 7,308.02

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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.