Home / 3,717.21-5,129.77-2,145.31

Finding the Fourth Proportional to 3,717.21, 5,129.77 and 2,145.31

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Solution

The fourth proportional to 3,717.21, 5,129.77 and 2,145.31 is: 2,960.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,717.21 : 5,129.77 = 2,145.31 : x
  2. Step 2: Convert to fraction form
    3,717.21/5,129.77 = 2,145.31/x
  3. Step 3: Cross multiply
    3,717.21x = 5,129.77 × 2,145.31
  4. Step 4: Simplify right side
    3,717.21x = 11,004,928.69
  5. Step 5: Solve for x
    x = 11,004,928.69/3,717.21
  6. Step 6: Final answer
    x = 2,960.53

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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.