Home / 5,431.56-8,144.16-2,145.36

Finding the Fourth Proportional to 5,431.56, 8,144.16 and 2,145.36

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Solution

The fourth proportional to 5,431.56, 8,144.16 and 2,145.36 is: 3,216.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.56 : 8,144.16 = 2,145.36 : x
  2. Step 2: Convert to fraction form
    5,431.56/8,144.16 = 2,145.36/x
  3. Step 3: Cross multiply
    5,431.56x = 8,144.16 × 2,145.36
  4. Step 4: Simplify right side
    5,431.56x = 17,472,155.10
  5. Step 5: Solve for x
    x = 17,472,155.10/5,431.56
  6. Step 6: Final answer
    x = 3,216.78

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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.