Home / 7,721.19-11,578.35-2,790.87

Finding the Fourth Proportional to 7,721.19, 11,578.35 and 2,790.87

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Solution

The fourth proportional to 7,721.19, 11,578.35 and 2,790.87 is: 4,185.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.19 : 11,578.35 = 2,790.87 : x
  2. Step 2: Convert to fraction form
    7,721.19/11,578.35 = 2,790.87/x
  3. Step 3: Cross multiply
    7,721.19x = 11,578.35 × 2,790.87
  4. Step 4: Simplify right side
    7,721.19x = 32,313,636.71
  5. Step 5: Solve for x
    x = 32,313,636.71/7,721.19
  6. Step 6: Final answer
    x = 4,185.06

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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.