Home / 3,865.10-5,810.50-3,139.74

Finding the Fourth Proportional to 3,865.10, 5,810.50 and 3,139.74

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Solution

The fourth proportional to 3,865.10, 5,810.50 and 3,139.74 is: 4,720.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.10 : 5,810.50 = 3,139.74 : x
  2. Step 2: Convert to fraction form
    3,865.10/5,810.50 = 3,139.74/x
  3. Step 3: Cross multiply
    3,865.10x = 5,810.50 × 3,139.74
  4. Step 4: Simplify right side
    3,865.10x = 18,243,459.27
  5. Step 5: Solve for x
    x = 18,243,459.27/3,865.10
  6. Step 6: Final answer
    x = 4,720.05

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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.