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Finding the Fourth Proportional to 18,419.12, 27,570 and 14,679.20

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Solution

The fourth proportional to 18,419.12, 27,570 and 14,679.20 is: 21,972.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.12 : 27,570 = 14,679.20 : x
  2. Step 2: Convert to fraction form
    18,419.12/27,570 = 14,679.20/x
  3. Step 3: Cross multiply
    18,419.12x = 27,570 × 14,679.20
  4. Step 4: Simplify right side
    18,419.12x = 404,705,544
  5. Step 5: Solve for x
    x = 404,705,544/18,419.12
  6. Step 6: Final answer
    x = 21,972.03

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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.