Home / 7,921.28-10,930.24-4,384.40

Finding the Fourth Proportional to 7,921.28, 10,930.24 and 4,384.40

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Solution

The fourth proportional to 7,921.28, 10,930.24 and 4,384.40 is: 6,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.28 : 10,930.24 = 4,384.40 : x
  2. Step 2: Convert to fraction form
    7,921.28/10,930.24 = 4,384.40/x
  3. Step 3: Cross multiply
    7,921.28x = 10,930.24 × 4,384.40
  4. Step 4: Simplify right side
    7,921.28x = 47,922,544.26
  5. Step 5: Solve for x
    x = 47,922,544.26/7,921.28
  6. Step 6: Final answer
    x = 6,049.85

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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.