Home / 3,990.48-5,505.84-2,418.54

Finding the Fourth Proportional to 3,990.48, 5,505.84 and 2,418.54

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Solution

The fourth proportional to 3,990.48, 5,505.84 and 2,418.54 is: 3,336.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.48 : 5,505.84 = 2,418.54 : x
  2. Step 2: Convert to fraction form
    3,990.48/5,505.84 = 2,418.54/x
  3. Step 3: Cross multiply
    3,990.48x = 5,505.84 × 2,418.54
  4. Step 4: Simplify right side
    3,990.48x = 13,316,094.27
  5. Step 5: Solve for x
    x = 13,316,094.27/3,990.48
  6. Step 6: Final answer
    x = 3,336.97

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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.