Home / 7,177.20-9,904.50-3,990.48

Finding the Fourth Proportional to 7,177.20, 9,904.50 and 3,990.48

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Solution

The fourth proportional to 7,177.20, 9,904.50 and 3,990.48 is: 5,506.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,177.20 : 9,904.50 = 3,990.48 : x
  2. Step 2: Convert to fraction form
    7,177.20/9,904.50 = 3,990.48/x
  3. Step 3: Cross multiply
    7,177.20x = 9,904.50 × 3,990.48
  4. Step 4: Simplify right side
    7,177.20x = 39,523,709.16
  5. Step 5: Solve for x
    x = 39,523,709.16/7,177.20
  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.