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Finding the Fourth Proportional to 7,410.40, 11,122.80 and 4,494.40

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Solution

The fourth proportional to 7,410.40, 11,122.80 and 4,494.40 is: 6,745.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,410.40 : 11,122.80 = 4,494.40 : x
  2. Step 2: Convert to fraction form
    7,410.40/11,122.80 = 4,494.40/x
  3. Step 3: Cross multiply
    7,410.40x = 11,122.80 × 4,494.40
  4. Step 4: Simplify right side
    7,410.40x = 49,990,312.32
  5. Step 5: Solve for x
    x = 49,990,312.32/7,410.40
  6. Step 6: Final answer
    x = 6,745.97

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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.