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Finding the Fourth Proportional to 11,212.57, 15,465.78 and 6,961.09

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Solution

The fourth proportional to 11,212.57, 15,465.78 and 6,961.09 is: 9,601.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,212.57 : 15,465.78 = 6,961.09 : x
  2. Step 2: Convert to fraction form
    11,212.57/15,465.78 = 6,961.09/x
  3. Step 3: Cross multiply
    11,212.57x = 15,465.78 × 6,961.09
  4. Step 4: Simplify right side
    11,212.57x = 107,658,686.50
  5. Step 5: Solve for x
    x = 107,658,686.50/11,212.57
  6. Step 6: Final answer
    x = 9,601.61

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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.