Home / 3,806.87-5,253.51-2,128.35

Finding the Fourth Proportional to 3,806.87, 5,253.51 and 2,128.35

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Solution

The fourth proportional to 3,806.87, 5,253.51 and 2,128.35 is: 2,937.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,806.87 : 5,253.51 = 2,128.35 : x
  2. Step 2: Convert to fraction form
    3,806.87/5,253.51 = 2,128.35/x
  3. Step 3: Cross multiply
    3,806.87x = 5,253.51 × 2,128.35
  4. Step 4: Simplify right side
    3,806.87x = 11,181,308.01
  5. Step 5: Solve for x
    x = 11,181,308.01/3,806.87
  6. Step 6: Final answer
    x = 2,937.14

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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.