Home / 7,177.20-9,904.53-3,990.49

Finding the Fourth Proportional to 7,177.20, 9,904.53 and 3,990.49

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Solution

The fourth proportional to 7,177.20, 9,904.53 and 3,990.49 is: 5,506.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,177.20 : 9,904.53 = 3,990.49 : x
  2. Step 2: Convert to fraction form
    7,177.20/9,904.53 = 3,990.49/x
  3. Step 3: Cross multiply
    7,177.20x = 9,904.53 × 3,990.49
  4. Step 4: Simplify right side
    7,177.20x = 39,523,927.92
  5. Step 5: Solve for x
    x = 39,523,927.92/7,177.20
  6. Step 6: Final answer
    x = 5,506.87

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.