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Finding the Fourth Proportional to 28,874, 43,311 and 6,986

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Solution

The fourth proportional to 28,874, 43,311 and 6,986 is: 10,479

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,874 : 43,311 = 6,986 : x
  2. Step 2: Convert to fraction form
    28,874/43,311 = 6,986/x
  3. Step 3: Cross multiply
    28,874x = 43,311 × 6,986
  4. Step 4: Simplify right side
    28,874x = 302,570,646
  5. Step 5: Solve for x
    x = 302,570,646/28,874
  6. Step 6: Final answer
    x = 10,479

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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.