Home / 21,081.11-31,618.78-7,040.84

Finding the Fourth Proportional to 21,081.11, 31,618.78 and 7,040.84

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Solution

The fourth proportional to 21,081.11, 31,618.78 and 7,040.84 is: 10,560.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.11 : 31,618.78 = 7,040.84 : x
  2. Step 2: Convert to fraction form
    21,081.11/31,618.78 = 7,040.84/x
  3. Step 3: Cross multiply
    21,081.11x = 31,618.78 × 7,040.84
  4. Step 4: Simplify right side
    21,081.11x = 222,622,770.98
  5. Step 5: Solve for x
    x = 222,622,770.98/21,081.11
  6. Step 6: Final answer
    x = 10,560.30

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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.