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Finding the Fourth Proportional to 12,695.67, 19,022.47 and 8,979.48

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Solution

The fourth proportional to 12,695.67, 19,022.47 and 8,979.48 is: 13,454.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.67 : 19,022.47 = 8,979.48 : x
  2. Step 2: Convert to fraction form
    12,695.67/19,022.47 = 8,979.48/x
  3. Step 3: Cross multiply
    12,695.67x = 19,022.47 × 8,979.48
  4. Step 4: Simplify right side
    12,695.67x = 170,811,866.47
  5. Step 5: Solve for x
    x = 170,811,866.47/12,695.67
  6. Step 6: Final answer
    x = 13,454.34

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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.