Home / 3,806.90-5,253.41-2,128.31

Finding the Fourth Proportional to 3,806.90, 5,253.41 and 2,128.31

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Solution

The fourth proportional to 3,806.90, 5,253.41 and 2,128.31 is: 2,937.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,806.90 : 5,253.41 = 2,128.31 : x
  2. Step 2: Convert to fraction form
    3,806.90/5,253.41 = 2,128.31/x
  3. Step 3: Cross multiply
    3,806.90x = 5,253.41 × 2,128.31
  4. Step 4: Simplify right side
    3,806.90x = 11,180,864.09
  5. Step 5: Solve for x
    x = 11,180,864.09/3,806.90
  6. Step 6: Final answer
    x = 2,937.00

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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.