Home / 3,890.56-5,368.88-2,122.18

Finding the Fourth Proportional to 3,890.56, 5,368.88 and 2,122.18

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Solution

The fourth proportional to 3,890.56, 5,368.88 and 2,122.18 is: 2,928.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.56 : 5,368.88 = 2,122.18 : x
  2. Step 2: Convert to fraction form
    3,890.56/5,368.88 = 2,122.18/x
  3. Step 3: Cross multiply
    3,890.56x = 5,368.88 × 2,122.18
  4. Step 4: Simplify right side
    3,890.56x = 11,393,692.30
  5. Step 5: Solve for x
    x = 11,393,692.30/3,890.56
  6. Step 6: Final answer
    x = 2,928.55

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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.