Home / 7,721.82-11,582.73-1,878.39

Finding the Fourth Proportional to 7,721.82, 11,582.73 and 1,878.39

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Solution

The fourth proportional to 7,721.82, 11,582.73 and 1,878.39 is: 2,817.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.82 : 11,582.73 = 1,878.39 : x
  2. Step 2: Convert to fraction form
    7,721.82/11,582.73 = 1,878.39/x
  3. Step 3: Cross multiply
    7,721.82x = 11,582.73 × 1,878.39
  4. Step 4: Simplify right side
    7,721.82x = 21,756,884.20
  5. Step 5: Solve for x
    x = 21,756,884.20/7,721.82
  6. Step 6: Final answer
    x = 2,817.59

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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.