Home / 7,920.68-10,930.51-4,286.72

Finding the Fourth Proportional to 7,920.68, 10,930.51 and 4,286.72

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Solution

The fourth proportional to 7,920.68, 10,930.51 and 4,286.72 is: 5,915.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.68 : 10,930.51 = 4,286.72 : x
  2. Step 2: Convert to fraction form
    7,920.68/10,930.51 = 4,286.72/x
  3. Step 3: Cross multiply
    7,920.68x = 10,930.51 × 4,286.72
  4. Step 4: Simplify right side
    7,920.68x = 46,855,982.91
  5. Step 5: Solve for x
    x = 46,855,982.91/7,920.68
  6. Step 6: Final answer
    x = 5,915.66

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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.