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Finding the Fourth Proportional to 48,658, 72,987 and 11,722

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Solution

The fourth proportional to 48,658, 72,987 and 11,722 is: 17,583

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,658 : 72,987 = 11,722 : x
  2. Step 2: Convert to fraction form
    48,658/72,987 = 11,722/x
  3. Step 3: Cross multiply
    48,658x = 72,987 × 11,722
  4. Step 4: Simplify right side
    48,658x = 855,553,614
  5. Step 5: Solve for x
    x = 855,553,614/48,658
  6. Step 6: Final answer
    x = 17,583

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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.