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Finding the Fourth Proportional to 13,663.49, 20,522.55 and 13,215.11

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Solution

The fourth proportional to 13,663.49, 20,522.55 and 13,215.11 is: 19,849.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.49 : 20,522.55 = 13,215.11 : x
  2. Step 2: Convert to fraction form
    13,663.49/20,522.55 = 13,215.11/x
  3. Step 3: Cross multiply
    13,663.49x = 20,522.55 × 13,215.11
  4. Step 4: Simplify right side
    13,663.49x = 271,207,755.73
  5. Step 5: Solve for x
    x = 271,207,755.73/13,663.49
  6. Step 6: Final answer
    x = 19,849.08

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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.