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Finding the Fourth Proportional to 8,121.25, 12,119.02 and 7,246.45

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Solution

The fourth proportional to 8,121.25, 12,119.02 and 7,246.45 is: 10,813.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.25 : 12,119.02 = 7,246.45 : x
  2. Step 2: Convert to fraction form
    8,121.25/12,119.02 = 7,246.45/x
  3. Step 3: Cross multiply
    8,121.25x = 12,119.02 × 7,246.45
  4. Step 4: Simplify right side
    8,121.25x = 87,819,872.48
  5. Step 5: Solve for x
    x = 87,819,872.48/8,121.25
  6. Step 6: Final answer
    x = 10,813.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.