Home / 5,422.14-8,129.34-1,911.42

Finding the Fourth Proportional to 5,422.14, 8,129.34 and 1,911.42

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Solution

The fourth proportional to 5,422.14, 8,129.34 and 1,911.42 is: 2,865.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.14 : 8,129.34 = 1,911.42 : x
  2. Step 2: Convert to fraction form
    5,422.14/8,129.34 = 1,911.42/x
  3. Step 3: Cross multiply
    5,422.14x = 8,129.34 × 1,911.42
  4. Step 4: Simplify right side
    5,422.14x = 15,538,583.06
  5. Step 5: Solve for x
    x = 15,538,583.06/5,422.14
  6. Step 6: Final answer
    x = 2,865.77

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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.