Home / 7,721.45-11,581.14-2,175.21

Finding the Fourth Proportional to 7,721.45, 11,581.14 and 2,175.21

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Solution

The fourth proportional to 7,721.45, 11,581.14 and 2,175.21 is: 3,262.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.45 : 11,581.14 = 2,175.21 : x
  2. Step 2: Convert to fraction form
    7,721.45/11,581.14 = 2,175.21/x
  3. Step 3: Cross multiply
    7,721.45x = 11,581.14 × 2,175.21
  4. Step 4: Simplify right side
    7,721.45x = 25,191,411.54
  5. Step 5: Solve for x
    x = 25,191,411.54/7,721.45
  6. Step 6: Final answer
    x = 3,262.53

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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.