Home / 4,920.21-7,380.09-1,998.54

Finding the Fourth Proportional to 4,920.21, 7,380.09 and 1,998.54

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Solution

The fourth proportional to 4,920.21, 7,380.09 and 1,998.54 is: 2,997.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.21 : 7,380.09 = 1,998.54 : x
  2. Step 2: Convert to fraction form
    4,920.21/7,380.09 = 1,998.54/x
  3. Step 3: Cross multiply
    4,920.21x = 7,380.09 × 1,998.54
  4. Step 4: Simplify right side
    4,920.21x = 14,749,405.07
  5. Step 5: Solve for x
    x = 14,749,405.07/4,920.21
  6. Step 6: Final answer
    x = 2,997.72

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Double scale
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Similar ratio
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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.