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Finding the Fourth Proportional to 21,954.48, 30,294.36 and 12,522.48

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Solution

The fourth proportional to 21,954.48, 30,294.36 and 12,522.48 is: 17,279.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,954.48 : 30,294.36 = 12,522.48 : x
  2. Step 2: Convert to fraction form
    21,954.48/30,294.36 = 12,522.48/x
  3. Step 3: Cross multiply
    21,954.48x = 30,294.36 × 12,522.48
  4. Step 4: Simplify right side
    21,954.48x = 379,360,517.21
  5. Step 5: Solve for x
    x = 379,360,517.21/21,954.48
  6. Step 6: Final answer
    x = 17,279.41

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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.