Home / 3,800.80-5,245.08-2,122.11

Finding the Fourth Proportional to 3,800.80, 5,245.08 and 2,122.11

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Solution

The fourth proportional to 3,800.80, 5,245.08 and 2,122.11 is: 2,928.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,800.80 : 5,245.08 = 2,122.11 : x
  2. Step 2: Convert to fraction form
    3,800.80/5,245.08 = 2,122.11/x
  3. Step 3: Cross multiply
    3,800.80x = 5,245.08 × 2,122.11
  4. Step 4: Simplify right side
    3,800.80x = 11,130,636.72
  5. Step 5: Solve for x
    x = 11,130,636.72/3,800.80
  6. Step 6: Final answer
    x = 2,928.50

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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.