Home / 3,688.80-5,525-2,125.12

Finding the Fourth Proportional to 3,688.80, 5,525 and 2,125.12

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Solution

The fourth proportional to 3,688.80, 5,525 and 2,125.12 is: 3,182.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.80 : 5,525 = 2,125.12 : x
  2. Step 2: Convert to fraction form
    3,688.80/5,525 = 2,125.12/x
  3. Step 3: Cross multiply
    3,688.80x = 5,525 × 2,125.12
  4. Step 4: Simplify right side
    3,688.80x = 11,741,288
  5. Step 5: Solve for x
    x = 11,741,288/3,688.80
  6. Step 6: Final answer
    x = 3,182.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.