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Finding the Fourth Proportional to 7,490.42, 11,218.11 and 5,919.88

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Solution

The fourth proportional to 7,490.42, 11,218.11 and 5,919.88 is: 8,865.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,490.42 : 11,218.11 = 5,919.88 : x
  2. Step 2: Convert to fraction form
    7,490.42/11,218.11 = 5,919.88/x
  3. Step 3: Cross multiply
    7,490.42x = 11,218.11 × 5,919.88
  4. Step 4: Simplify right side
    7,490.42x = 66,409,836.98
  5. Step 5: Solve for x
    x = 66,409,836.98/7,490.42
  6. Step 6: Final answer
    x = 8,865.98

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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.