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Finding the Fourth Proportional to 7,085.87, 10,628.99 and 1,891.91

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Solution

The fourth proportional to 7,085.87, 10,628.99 and 1,891.91 is: 2,837.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.87 : 10,628.99 = 1,891.91 : x
  2. Step 2: Convert to fraction form
    7,085.87/10,628.99 = 1,891.91/x
  3. Step 3: Cross multiply
    7,085.87x = 10,628.99 × 1,891.91
  4. Step 4: Simplify right side
    7,085.87x = 20,109,092.47
  5. Step 5: Solve for x
    x = 20,109,092.47/7,085.87
  6. Step 6: Final answer
    x = 2,837.91

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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.