Home / 6,621.28-9,928.12-5,119.76

Finding the Fourth Proportional to 6,621.28, 9,928.12 and 5,119.76

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Solution

The fourth proportional to 6,621.28, 9,928.12 and 5,119.76 is: 7,676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.28 : 9,928.12 = 5,119.76 : x
  2. Step 2: Convert to fraction form
    6,621.28/9,928.12 = 5,119.76/x
  3. Step 3: Cross multiply
    6,621.28x = 9,928.12 × 5,119.76
  4. Step 4: Simplify right side
    6,621.28x = 50,829,591.65
  5. Step 5: Solve for x
    x = 50,829,591.65/6,621.28
  6. Step 6: Final answer
    x = 7,676.70

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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.