Home / 5,140.72-7,712.81-1,631.30

Finding the Fourth Proportional to 5,140.72, 7,712.81 and 1,631.30

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Solution

The fourth proportional to 5,140.72, 7,712.81 and 1,631.30 is: 2,447.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.72 : 7,712.81 = 1,631.30 : x
  2. Step 2: Convert to fraction form
    5,140.72/7,712.81 = 1,631.30/x
  3. Step 3: Cross multiply
    5,140.72x = 7,712.81 × 1,631.30
  4. Step 4: Simplify right side
    5,140.72x = 12,581,906.95
  5. Step 5: Solve for x
    x = 12,581,906.95/5,140.72
  6. Step 6: Final answer
    x = 2,447.50

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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.