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Finding the Fourth Proportional to 7,085.88, 10,629.09 and 1,891.76

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Solution

The fourth proportional to 7,085.88, 10,629.09 and 1,891.76 is: 2,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.88 : 10,629.09 = 1,891.76 : x
  2. Step 2: Convert to fraction form
    7,085.88/10,629.09 = 1,891.76/x
  3. Step 3: Cross multiply
    7,085.88x = 10,629.09 × 1,891.76
  4. Step 4: Simplify right side
    7,085.88x = 20,107,634.15
  5. Step 5: Solve for x
    x = 20,107,634.15/7,085.88
  6. Step 6: Final answer
    x = 2,837.70

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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.