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Finding the Fourth Proportional to 22,912.40, 34,394.20 and 21,408.40

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Solution

The fourth proportional to 22,912.40, 34,394.20 and 21,408.40 is: 32,136.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,912.40 : 34,394.20 = 21,408.40 : x
  2. Step 2: Convert to fraction form
    22,912.40/34,394.20 = 21,408.40/x
  3. Step 3: Cross multiply
    22,912.40x = 34,394.20 × 21,408.40
  4. Step 4: Simplify right side
    22,912.40x = 736,324,791.28
  5. Step 5: Solve for x
    x = 736,324,791.28/22,912.40
  6. Step 6: Final answer
    x = 32,136.52

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1.5x scale

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.