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Finding the Fourth Proportional to 7,213.98, 9,955.79 and 4,027.90

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Solution

The fourth proportional to 7,213.98, 9,955.79 and 4,027.90 is: 5,558.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,213.98 : 9,955.79 = 4,027.90 : x
  2. Step 2: Convert to fraction form
    7,213.98/9,955.79 = 4,027.90/x
  3. Step 3: Cross multiply
    7,213.98x = 9,955.79 × 4,027.90
  4. Step 4: Simplify right side
    7,213.98x = 40,100,856.62
  5. Step 5: Solve for x
    x = 40,100,856.62/7,213.98
  6. Step 6: Final answer
    x = 5,558.77

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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.