Home / 6,639.56-9,162.36-3,985.40

Finding the Fourth Proportional to 6,639.56, 9,162.36 and 3,985.40

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Solution

The fourth proportional to 6,639.56, 9,162.36 and 3,985.40 is: 5,499.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.56 : 9,162.36 = 3,985.40 : x
  2. Step 2: Convert to fraction form
    6,639.56/9,162.36 = 3,985.40/x
  3. Step 3: Cross multiply
    6,639.56x = 9,162.36 × 3,985.40
  4. Step 4: Simplify right side
    6,639.56x = 36,515,669.54
  5. Step 5: Solve for x
    x = 36,515,669.54/6,639.56
  6. Step 6: Final answer
    x = 5,499.71

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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.