Home / 3,721.05-5,130.45-3,125.88

Finding the Fourth Proportional to 3,721.05, 5,130.45 and 3,125.88

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Solution

The fourth proportional to 3,721.05, 5,130.45 and 3,125.88 is: 4,309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.05 : 5,130.45 = 3,125.88 : x
  2. Step 2: Convert to fraction form
    3,721.05/5,130.45 = 3,125.88/x
  3. Step 3: Cross multiply
    3,721.05x = 5,130.45 × 3,125.88
  4. Step 4: Simplify right side
    3,721.05x = 16,037,171.05
  5. Step 5: Solve for x
    x = 16,037,171.05/3,721.05
  6. Step 6: Final answer
    x = 4,309.85

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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.