Home / 7,721.09-11,581.63-2,790.62

Finding the Fourth Proportional to 7,721.09, 11,581.63 and 2,790.62

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Solution

The fourth proportional to 7,721.09, 11,581.63 and 2,790.62 is: 4,185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.09 : 11,581.63 = 2,790.62 : x
  2. Step 2: Convert to fraction form
    7,721.09/11,581.63 = 2,790.62/x
  3. Step 3: Cross multiply
    7,721.09x = 11,581.63 × 2,790.62
  4. Step 4: Simplify right side
    7,721.09x = 32,319,928.31
  5. Step 5: Solve for x
    x = 32,319,928.31/7,721.09
  6. Step 6: Final answer
    x = 4,185.93

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Similar ratio
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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.