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Finding the Fourth Proportional to 15,902.39, 21,954.83 and 9,942.14

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Solution

The fourth proportional to 15,902.39, 21,954.83 and 9,942.14 is: 13,726.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,902.39 : 21,954.83 = 9,942.14 : x
  2. Step 2: Convert to fraction form
    15,902.39/21,954.83 = 9,942.14/x
  3. Step 3: Cross multiply
    15,902.39x = 21,954.83 × 9,942.14
  4. Step 4: Simplify right side
    15,902.39x = 218,277,943.83
  5. Step 5: Solve for x
    x = 218,277,943.83/15,902.39
  6. Step 6: Final answer
    x = 13,726.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.