Home / 3,639.80-5,462.10-1,331.30

Finding the Fourth Proportional to 3,639.80, 5,462.10 and 1,331.30

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Solution

The fourth proportional to 3,639.80, 5,462.10 and 1,331.30 is: 1,997.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.80 : 5,462.10 = 1,331.30 : x
  2. Step 2: Convert to fraction form
    3,639.80/5,462.10 = 1,331.30/x
  3. Step 3: Cross multiply
    3,639.80x = 5,462.10 × 1,331.30
  4. Step 4: Simplify right side
    3,639.80x = 7,271,693.73
  5. Step 5: Solve for x
    x = 7,271,693.73/3,639.80
  6. Step 6: Final answer
    x = 1,997.83

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1.5x scale

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.