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Finding the Fourth Proportional to 18,873.42, 28,285.62 and 7,767.48

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Solution

The fourth proportional to 18,873.42, 28,285.62 and 7,767.48 is: 11,641.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.42 : 28,285.62 = 7,767.48 : x
  2. Step 2: Convert to fraction form
    18,873.42/28,285.62 = 7,767.48/x
  3. Step 3: Cross multiply
    18,873.42x = 28,285.62 × 7,767.48
  4. Step 4: Simplify right side
    18,873.42x = 219,707,987.64
  5. Step 5: Solve for x
    x = 219,707,987.64/18,873.42
  6. Step 6: Final answer
    x = 11,641.13

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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.