Home / 7,721.92-11,582.94-1,878.58

Finding the Fourth Proportional to 7,721.92, 11,582.94 and 1,878.58

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Solution

The fourth proportional to 7,721.92, 11,582.94 and 1,878.58 is: 2,817.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.92 : 11,582.94 = 1,878.58 : x
  2. Step 2: Convert to fraction form
    7,721.92/11,582.94 = 1,878.58/x
  3. Step 3: Cross multiply
    7,721.92x = 11,582.94 × 1,878.58
  4. Step 4: Simplify right side
    7,721.92x = 21,759,479.43
  5. Step 5: Solve for x
    x = 21,759,479.43/7,721.92
  6. Step 6: Final answer
    x = 2,817.88

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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.