Home / 7,721.91-11,575.71-4,206.78

Finding the Fourth Proportional to 7,721.91, 11,575.71 and 4,206.78

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Solution

The fourth proportional to 7,721.91, 11,575.71 and 4,206.78 is: 6,306.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.91 : 11,575.71 = 4,206.78 : x
  2. Step 2: Convert to fraction form
    7,721.91/11,575.71 = 4,206.78/x
  3. Step 3: Cross multiply
    7,721.91x = 11,575.71 × 4,206.78
  4. Step 4: Simplify right side
    7,721.91x = 48,696,465.31
  5. Step 5: Solve for x
    x = 48,696,465.31/7,721.91
  6. Step 6: Final answer
    x = 6,306.27

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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.