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Finding the Fourth Proportional to 19,338.60, 28,991.16 and 11,531.01

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Solution

The fourth proportional to 19,338.60, 28,991.16 and 11,531.01 is: 17,286.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,338.60 : 28,991.16 = 11,531.01 : x
  2. Step 2: Convert to fraction form
    19,338.60/28,991.16 = 11,531.01/x
  3. Step 3: Cross multiply
    19,338.60x = 28,991.16 × 11,531.01
  4. Step 4: Simplify right side
    19,338.60x = 334,297,355.87
  5. Step 5: Solve for x
    x = 334,297,355.87/19,338.60
  6. Step 6: Final answer
    x = 17,286.53

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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.