Home / 3,897.25-5,378.21-2,129.01

Finding the Fourth Proportional to 3,897.25, 5,378.21 and 2,129.01

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Solution

The fourth proportional to 3,897.25, 5,378.21 and 2,129.01 is: 2,938.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.25 : 5,378.21 = 2,129.01 : x
  2. Step 2: Convert to fraction form
    3,897.25/5,378.21 = 2,129.01/x
  3. Step 3: Cross multiply
    3,897.25x = 5,378.21 × 2,129.01
  4. Step 4: Simplify right side
    3,897.25x = 11,450,262.87
  5. Step 5: Solve for x
    x = 11,450,262.87/3,897.25
  6. Step 6: Final answer
    x = 2,938.04

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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.