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Finding the Fourth Proportional to 12,695.33, 17,519.97 and 8,438.97

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Solution

The fourth proportional to 12,695.33, 17,519.97 and 8,438.97 is: 11,646.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.33 : 17,519.97 = 8,438.97 : x
  2. Step 2: Convert to fraction form
    12,695.33/17,519.97 = 8,438.97/x
  3. Step 3: Cross multiply
    12,695.33x = 17,519.97 × 8,438.97
  4. Step 4: Simplify right side
    12,695.33x = 147,850,501.23
  5. Step 5: Solve for x
    x = 147,850,501.23/12,695.33
  6. Step 6: Final answer
    x = 11,646.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.