Home / 6,990.12-9,660.18-5,729.16

Finding the Fourth Proportional to 6,990.12, 9,660.18 and 5,729.16

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Solution

The fourth proportional to 6,990.12, 9,660.18 and 5,729.16 is: 7,917.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.12 : 9,660.18 = 5,729.16 : x
  2. Step 2: Convert to fraction form
    6,990.12/9,660.18 = 5,729.16/x
  3. Step 3: Cross multiply
    6,990.12x = 9,660.18 × 5,729.16
  4. Step 4: Simplify right side
    6,990.12x = 55,344,716.85
  5. Step 5: Solve for x
    x = 55,344,716.85/6,990.12
  6. Step 6: Final answer
    x = 7,917.56

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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.