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Finding the Fourth Proportional to 18,698.88, 28,042.56 and 6,384

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Solution

The fourth proportional to 18,698.88, 28,042.56 and 6,384 is: 9,574.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.88 : 28,042.56 = 6,384 : x
  2. Step 2: Convert to fraction form
    18,698.88/28,042.56 = 6,384/x
  3. Step 3: Cross multiply
    18,698.88x = 28,042.56 × 6,384
  4. Step 4: Simplify right side
    18,698.88x = 179,023,703.04
  5. Step 5: Solve for x
    x = 179,023,703.04/18,698.88
  6. Step 6: Final answer
    x = 9,574.03

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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.