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Finding the Fourth Proportional to 18,132.90, 27,199.35 and 13,236.90

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Solution

The fourth proportional to 18,132.90, 27,199.35 and 13,236.90 is: 19,855.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,132.90 : 27,199.35 = 13,236.90 : x
  2. Step 2: Convert to fraction form
    18,132.90/27,199.35 = 13,236.90/x
  3. Step 3: Cross multiply
    18,132.90x = 27,199.35 × 13,236.90
  4. Step 4: Simplify right side
    18,132.90x = 360,035,076.02
  5. Step 5: Solve for x
    x = 360,035,076.02/18,132.90
  6. Step 6: Final answer
    x = 19,855.35

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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.