Home / 7,177.40-9,904.63-3,990.53

Finding the Fourth Proportional to 7,177.40, 9,904.63 and 3,990.53

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Solution

The fourth proportional to 7,177.40, 9,904.63 and 3,990.53 is: 5,506.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,177.40 : 9,904.63 = 3,990.53 : x
  2. Step 2: Convert to fraction form
    7,177.40/9,904.63 = 3,990.53/x
  3. Step 3: Cross multiply
    7,177.40x = 9,904.63 × 3,990.53
  4. Step 4: Simplify right side
    7,177.40x = 39,524,778.94
  5. Step 5: Solve for x
    x = 39,524,778.94/7,177.40
  6. Step 6: Final answer
    x = 5,506.84

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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.