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Finding the Fourth Proportional to 18,812.52, 28,218.60 and 11,419.02

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Solution

The fourth proportional to 18,812.52, 28,218.60 and 11,419.02 is: 17,128.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.52 : 28,218.60 = 11,419.02 : x
  2. Step 2: Convert to fraction form
    18,812.52/28,218.60 = 11,419.02/x
  3. Step 3: Cross multiply
    18,812.52x = 28,218.60 × 11,419.02
  4. Step 4: Simplify right side
    18,812.52x = 322,228,757.77
  5. Step 5: Solve for x
    x = 322,228,757.77/18,812.52
  6. Step 6: Final answer
    x = 17,128.42

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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.