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Finding the Fourth Proportional to 12,990.10, 17,922.04 and 7,324.14

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Solution

The fourth proportional to 12,990.10, 17,922.04 and 7,324.14 is: 10,104.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.10 : 17,922.04 = 7,324.14 : x
  2. Step 2: Convert to fraction form
    12,990.10/17,922.04 = 7,324.14/x
  3. Step 3: Cross multiply
    12,990.10x = 17,922.04 × 7,324.14
  4. Step 4: Simplify right side
    12,990.10x = 131,263,530.05
  5. Step 5: Solve for x
    x = 131,263,530.05/12,990.10
  6. Step 6: Final answer
    x = 10,104.89

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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.