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Finding the Fourth Proportional to 28,944.79, 43,489.86 and 18,419.40

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Solution

The fourth proportional to 28,944.79, 43,489.86 and 18,419.40 is: 27,675.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,944.79 : 43,489.86 = 18,419.40 : x
  2. Step 2: Convert to fraction form
    28,944.79/43,489.86 = 18,419.40/x
  3. Step 3: Cross multiply
    28,944.79x = 43,489.86 × 18,419.40
  4. Step 4: Simplify right side
    28,944.79x = 801,057,161.82
  5. Step 5: Solve for x
    x = 801,057,161.82/28,944.79
  6. Step 6: Final answer
    x = 27,675.35

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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.