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Finding the Fourth Proportional to 12,822.97, 17,695.66 and 7,157.67

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Solution

The fourth proportional to 12,822.97, 17,695.66 and 7,157.67 is: 9,877.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,822.97 : 17,695.66 = 7,157.67 : x
  2. Step 2: Convert to fraction form
    12,822.97/17,695.66 = 7,157.67/x
  3. Step 3: Cross multiply
    12,822.97x = 17,695.66 × 7,157.67
  4. Step 4: Simplify right side
    12,822.97x = 126,659,696.58
  5. Step 5: Solve for x
    x = 126,659,696.58/12,822.97
  6. Step 6: Final answer
    x = 9,877.56

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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.