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Finding the Fourth Proportional to 19,791.42, 27,311.01 and 10,839.11

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Solution

The fourth proportional to 19,791.42, 27,311.01 and 10,839.11 is: 14,957.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.42 : 27,311.01 = 10,839.11 : x
  2. Step 2: Convert to fraction form
    19,791.42/27,311.01 = 10,839.11/x
  3. Step 3: Cross multiply
    19,791.42x = 27,311.01 × 10,839.11
  4. Step 4: Simplify right side
    19,791.42x = 296,026,905.05
  5. Step 5: Solve for x
    x = 296,026,905.05/19,791.42
  6. Step 6: Final answer
    x = 14,957.34

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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.