Home / 6,820.40-10,230.78-2,660.24

Finding the Fourth Proportional to 6,820.40, 10,230.78 and 2,660.24

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Solution

The fourth proportional to 6,820.40, 10,230.78 and 2,660.24 is: 3,990.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,820.40 : 10,230.78 = 2,660.24 : x
  2. Step 2: Convert to fraction form
    6,820.40/10,230.78 = 2,660.24/x
  3. Step 3: Cross multiply
    6,820.40x = 10,230.78 × 2,660.24
  4. Step 4: Simplify right side
    6,820.40x = 27,216,330.19
  5. Step 5: Solve for x
    x = 27,216,330.19/6,820.40
  6. Step 6: Final answer
    x = 3,990.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.