Home / 3,830.85-5,286.56-2,152.30

Finding the Fourth Proportional to 3,830.85, 5,286.56 and 2,152.30

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Solution

The fourth proportional to 3,830.85, 5,286.56 and 2,152.30 is: 2,970.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.85 : 5,286.56 = 2,152.30 : x
  2. Step 2: Convert to fraction form
    3,830.85/5,286.56 = 2,152.30/x
  3. Step 3: Cross multiply
    3,830.85x = 5,286.56 × 2,152.30
  4. Step 4: Simplify right side
    3,830.85x = 11,378,263.09
  5. Step 5: Solve for x
    x = 11,378,263.09/3,830.85
  6. Step 6: Final answer
    x = 2,970.17

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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.