Home / 7,177.26-9,904.56-3,990.57

Finding the Fourth Proportional to 7,177.26, 9,904.56 and 3,990.57

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Solution

The fourth proportional to 7,177.26, 9,904.56 and 3,990.57 is: 5,506.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,177.26 : 9,904.56 = 3,990.57 : x
  2. Step 2: Convert to fraction form
    7,177.26/9,904.56 = 3,990.57/x
  3. Step 3: Cross multiply
    7,177.26x = 9,904.56 × 3,990.57
  4. Step 4: Simplify right side
    7,177.26x = 39,524,840.00
  5. Step 5: Solve for x
    x = 39,524,840.00/7,177.26
  6. Step 6: Final answer
    x = 5,506.95

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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.