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Finding the Fourth Proportional to 48,660, 72,990 and 11,724

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Solution

The fourth proportional to 48,660, 72,990 and 11,724 is: 17,586

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,660 : 72,990 = 11,724 : x
  2. Step 2: Convert to fraction form
    48,660/72,990 = 11,724/x
  3. Step 3: Cross multiply
    48,660x = 72,990 × 11,724
  4. Step 4: Simplify right side
    48,660x = 855,734,760
  5. Step 5: Solve for x
    x = 855,734,760/48,660
  6. Step 6: Final answer
    x = 17,586

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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.