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Finding the Fourth Proportional to 12,994.52, 17,935.21 and 8,211.42

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Solution

The fourth proportional to 12,994.52, 17,935.21 and 8,211.42 is: 11,333.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,994.52 : 17,935.21 = 8,211.42 : x
  2. Step 2: Convert to fraction form
    12,994.52/17,935.21 = 8,211.42/x
  3. Step 3: Cross multiply
    12,994.52x = 17,935.21 × 8,211.42
  4. Step 4: Simplify right side
    12,994.52x = 147,273,525.01
  5. Step 5: Solve for x
    x = 147,273,525.01/12,994.52
  6. Step 6: Final answer
    x = 11,333.51

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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.