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Finding the Fourth Proportional to 7,873.54, 11,811.39 and 3,490.90

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Solution

The fourth proportional to 7,873.54, 11,811.39 and 3,490.90 is: 5,236.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,873.54 : 11,811.39 = 3,490.90 : x
  2. Step 2: Convert to fraction form
    7,873.54/11,811.39 = 3,490.90/x
  3. Step 3: Cross multiply
    7,873.54x = 11,811.39 × 3,490.90
  4. Step 4: Simplify right side
    7,873.54x = 41,232,381.35
  5. Step 5: Solve for x
    x = 41,232,381.35/7,873.54
  6. Step 6: Final answer
    x = 5,236.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.