Home / 5,913.78-8,158.20-3,899.30

Finding the Fourth Proportional to 5,913.78, 8,158.20 and 3,899.30

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Solution

The fourth proportional to 5,913.78, 8,158.20 and 3,899.30 is: 5,379.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,913.78 : 8,158.20 = 3,899.30 : x
  2. Step 2: Convert to fraction form
    5,913.78/8,158.20 = 3,899.30/x
  3. Step 3: Cross multiply
    5,913.78x = 8,158.20 × 3,899.30
  4. Step 4: Simplify right side
    5,913.78x = 31,811,269.26
  5. Step 5: Solve for x
    x = 31,811,269.26/5,913.78
  6. Step 6: Final answer
    x = 5,379.18

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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.