Home / 5,478.82-7,561.11-3,121.18

Finding the Fourth Proportional to 5,478.82, 7,561.11 and 3,121.18

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Solution

The fourth proportional to 5,478.82, 7,561.11 and 3,121.18 is: 4,307.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.82 : 7,561.11 = 3,121.18 : x
  2. Step 2: Convert to fraction form
    5,478.82/7,561.11 = 3,121.18/x
  3. Step 3: Cross multiply
    5,478.82x = 7,561.11 × 3,121.18
  4. Step 4: Simplify right side
    5,478.82x = 23,599,585.31
  5. Step 5: Solve for x
    x = 23,599,585.31/5,478.82
  6. Step 6: Final answer
    x = 4,307.42

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Half scale
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Double scale
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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.