Home / 7,721.88-11,582.82-1,878.45

Finding the Fourth Proportional to 7,721.88, 11,582.82 and 1,878.45

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Solution

The fourth proportional to 7,721.88, 11,582.82 and 1,878.45 is: 2,817.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.88 : 11,582.82 = 1,878.45 : x
  2. Step 2: Convert to fraction form
    7,721.88/11,582.82 = 1,878.45/x
  3. Step 3: Cross multiply
    7,721.88x = 11,582.82 × 1,878.45
  4. Step 4: Simplify right side
    7,721.88x = 21,757,748.23
  5. Step 5: Solve for x
    x = 21,757,748.23/7,721.88
  6. Step 6: Final answer
    x = 2,817.68

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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.