Home / 3,861.50-5,325.20-3,115.08

Finding the Fourth Proportional to 3,861.50, 5,325.20 and 3,115.08

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Solution

The fourth proportional to 3,861.50, 5,325.20 and 3,115.08 is: 4,295.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.50 : 5,325.20 = 3,115.08 : x
  2. Step 2: Convert to fraction form
    3,861.50/5,325.20 = 3,115.08/x
  3. Step 3: Cross multiply
    3,861.50x = 5,325.20 × 3,115.08
  4. Step 4: Simplify right side
    3,861.50x = 16,588,424.02
  5. Step 5: Solve for x
    x = 16,588,424.02/3,861.50
  6. Step 6: Final answer
    x = 4,295.85

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1.5x scale

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.