Home / 5,419.10-8,129.80-1,908.97

Finding the Fourth Proportional to 5,419.10, 8,129.80 and 1,908.97

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Solution

The fourth proportional to 5,419.10, 8,129.80 and 1,908.97 is: 2,863.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.10 : 8,129.80 = 1,908.97 : x
  2. Step 2: Convert to fraction form
    5,419.10/8,129.80 = 1,908.97/x
  3. Step 3: Cross multiply
    5,419.10x = 8,129.80 × 1,908.97
  4. Step 4: Simplify right side
    5,419.10x = 15,519,526.37
  5. Step 5: Solve for x
    x = 15,519,526.37/5,419.10
  6. Step 6: Final answer
    x = 2,863.86

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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.