Home / 6,639.05-9,161.45-3,987.92

Finding the Fourth Proportional to 6,639.05, 9,161.45 and 3,987.92

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Solution

The fourth proportional to 6,639.05, 9,161.45 and 3,987.92 is: 5,503.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.05 : 9,161.45 = 3,987.92 : x
  2. Step 2: Convert to fraction form
    6,639.05/9,161.45 = 3,987.92/x
  3. Step 3: Cross multiply
    6,639.05x = 9,161.45 × 3,987.92
  4. Step 4: Simplify right side
    6,639.05x = 36,535,063.94
  5. Step 5: Solve for x
    x = 36,535,063.94/6,639.05
  6. Step 6: Final answer
    x = 5,503.06

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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.