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Finding the Fourth Proportional to 18,348.60, 27,522.90 and 11,787.60

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Solution

The fourth proportional to 18,348.60, 27,522.90 and 11,787.60 is: 17,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.60 : 27,522.90 = 11,787.60 : x
  2. Step 2: Convert to fraction form
    18,348.60/27,522.90 = 11,787.60/x
  3. Step 3: Cross multiply
    18,348.60x = 27,522.90 × 11,787.60
  4. Step 4: Simplify right side
    18,348.60x = 324,428,936.04
  5. Step 5: Solve for x
    x = 324,428,936.04/18,348.60
  6. Step 6: Final answer
    x = 17,681.40

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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.