Home / 3,890.39-5,367.21-2,188.50

Finding the Fourth Proportional to 3,890.39, 5,367.21 and 2,188.50

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Solution

The fourth proportional to 3,890.39, 5,367.21 and 2,188.50 is: 3,019.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.39 : 5,367.21 = 2,188.50 : x
  2. Step 2: Convert to fraction form
    3,890.39/5,367.21 = 2,188.50/x
  3. Step 3: Cross multiply
    3,890.39x = 5,367.21 × 2,188.50
  4. Step 4: Simplify right side
    3,890.39x = 11,746,139.09
  5. Step 5: Solve for x
    x = 11,746,139.09/3,890.39
  6. Step 6: Final answer
    x = 3,019.27

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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.