Home / 3,638.80-5,019.78-2,459.80

Finding the Fourth Proportional to 3,638.80, 5,019.78 and 2,459.80

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Solution

The fourth proportional to 3,638.80, 5,019.78 and 2,459.80 is: 3,393.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.80 : 5,019.78 = 2,459.80 : x
  2. Step 2: Convert to fraction form
    3,638.80/5,019.78 = 2,459.80/x
  3. Step 3: Cross multiply
    3,638.80x = 5,019.78 × 2,459.80
  4. Step 4: Simplify right side
    3,638.80x = 12,347,654.84
  5. Step 5: Solve for x
    x = 12,347,654.84/3,638.80
  6. Step 6: Final answer
    x = 3,393.33

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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.