Home / 3,869.21-5,339.61-2,190.62

Finding the Fourth Proportional to 3,869.21, 5,339.61 and 2,190.62

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Solution

The fourth proportional to 3,869.21, 5,339.61 and 2,190.62 is: 3,023.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.21 : 5,339.61 = 2,190.62 : x
  2. Step 2: Convert to fraction form
    3,869.21/5,339.61 = 2,190.62/x
  3. Step 3: Cross multiply
    3,869.21x = 5,339.61 × 2,190.62
  4. Step 4: Simplify right side
    3,869.21x = 11,697,069.81
  5. Step 5: Solve for x
    x = 11,697,069.81/3,869.21
  6. Step 6: Final answer
    x = 3,023.11

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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.