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Finding the Fourth Proportional to 18,904.43, 28,357.95 and 6,419.36

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Solution

The fourth proportional to 18,904.43, 28,357.95 and 6,419.36 is: 9,629.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.43 : 28,357.95 = 6,419.36 : x
  2. Step 2: Convert to fraction form
    18,904.43/28,357.95 = 6,419.36/x
  3. Step 3: Cross multiply
    18,904.43x = 28,357.95 × 6,419.36
  4. Step 4: Simplify right side
    18,904.43x = 182,039,889.91
  5. Step 5: Solve for x
    x = 182,039,889.91/18,904.43
  6. Step 6: Final answer
    x = 9,629.48

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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.