Home / 6,639.60-9,162.39-3,987.27

Finding the Fourth Proportional to 6,639.60, 9,162.39 and 3,987.27

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Solution

The fourth proportional to 6,639.60, 9,162.39 and 3,987.27 is: 5,502.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.60 : 9,162.39 = 3,987.27 : x
  2. Step 2: Convert to fraction form
    6,639.60/9,162.39 = 3,987.27/x
  3. Step 3: Cross multiply
    6,639.60x = 9,162.39 × 3,987.27
  4. Step 4: Simplify right side
    6,639.60x = 36,532,922.78
  5. Step 5: Solve for x
    x = 36,532,922.78/6,639.60
  6. Step 6: Final answer
    x = 5,502.28

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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.