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Finding the Fourth Proportional to 13,486.68, 18,687.05 and 13,180.50

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Solution

The fourth proportional to 13,486.68, 18,687.05 and 13,180.50 is: 18,262.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.68 : 18,687.05 = 13,180.50 : x
  2. Step 2: Convert to fraction form
    13,486.68/18,687.05 = 13,180.50/x
  3. Step 3: Cross multiply
    13,486.68x = 18,687.05 × 13,180.50
  4. Step 4: Simplify right side
    13,486.68x = 246,304,662.53
  5. Step 5: Solve for x
    x = 246,304,662.53/13,486.68
  6. Step 6: Final answer
    x = 18,262.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.