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Finding the Fourth Proportional to 18,479.84, 27,768.36 and 9,721.04

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Solution

The fourth proportional to 18,479.84, 27,768.36 and 9,721.04 is: 14,607.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.84 : 27,768.36 = 9,721.04 : x
  2. Step 2: Convert to fraction form
    18,479.84/27,768.36 = 9,721.04/x
  3. Step 3: Cross multiply
    18,479.84x = 27,768.36 × 9,721.04
  4. Step 4: Simplify right side
    18,479.84x = 269,937,338.29
  5. Step 5: Solve for x
    x = 269,937,338.29/18,479.84
  6. Step 6: Final answer
    x = 14,607.13

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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.