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Finding the Fourth Proportional to 7,891.97, 10,891.44 and 4,355.19

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Solution

The fourth proportional to 7,891.97, 10,891.44 and 4,355.19 is: 6,010.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.97 : 10,891.44 = 4,355.19 : x
  2. Step 2: Convert to fraction form
    7,891.97/10,891.44 = 4,355.19/x
  3. Step 3: Cross multiply
    7,891.97x = 10,891.44 × 4,355.19
  4. Step 4: Simplify right side
    7,891.97x = 47,434,290.57
  5. Step 5: Solve for x
    x = 47,434,290.57/7,891.97
  6. Step 6: Final answer
    x = 6,010.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.