Home / 4,086.40-5,639.05-2,318.12

Finding the Fourth Proportional to 4,086.40, 5,639.05 and 2,318.12

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Solution

The fourth proportional to 4,086.40, 5,639.05 and 2,318.12 is: 3,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,086.40 : 5,639.05 = 2,318.12 : x
  2. Step 2: Convert to fraction form
    4,086.40/5,639.05 = 2,318.12/x
  3. Step 3: Cross multiply
    4,086.40x = 5,639.05 × 2,318.12
  4. Step 4: Simplify right side
    4,086.40x = 13,071,994.59
  5. Step 5: Solve for x
    x = 13,071,994.59/4,086.40
  6. Step 6: Final answer
    x = 3,198.90

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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.