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Finding the Fourth Proportional to 7,181.61, 9,910.74 and 3,951.58

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Solution

The fourth proportional to 7,181.61, 9,910.74 and 3,951.58 is: 5,453.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.61 : 9,910.74 = 3,951.58 : x
  2. Step 2: Convert to fraction form
    7,181.61/9,910.74 = 3,951.58/x
  3. Step 3: Cross multiply
    7,181.61x = 9,910.74 × 3,951.58
  4. Step 4: Simplify right side
    7,181.61x = 39,163,081.97
  5. Step 5: Solve for x
    x = 39,163,081.97/7,181.61
  6. Step 6: Final answer
    x = 5,453.25

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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.