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Finding the Fourth Proportional to 18,513.52, 25,522.08 and 13,199.12

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Solution

The fourth proportional to 18,513.52, 25,522.08 and 13,199.12 is: 18,195.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,513.52 : 25,522.08 = 13,199.12 : x
  2. Step 2: Convert to fraction form
    18,513.52/25,522.08 = 13,199.12/x
  3. Step 3: Cross multiply
    18,513.52x = 25,522.08 × 13,199.12
  4. Step 4: Simplify right side
    18,513.52x = 336,868,996.57
  5. Step 5: Solve for x
    x = 336,868,996.57/18,513.52
  6. Step 6: Final answer
    x = 18,195.84

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