Home / 5,127.81-7,688.07-2,629.75

Finding the Fourth Proportional to 5,127.81, 7,688.07 and 2,629.75

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Solution

The fourth proportional to 5,127.81, 7,688.07 and 2,629.75 is: 3,942.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,127.81 : 7,688.07 = 2,629.75 : x
  2. Step 2: Convert to fraction form
    5,127.81/7,688.07 = 2,629.75/x
  3. Step 3: Cross multiply
    5,127.81x = 7,688.07 × 2,629.75
  4. Step 4: Simplify right side
    5,127.81x = 20,217,697.28
  5. Step 5: Solve for x
    x = 20,217,697.28/5,127.81
  6. Step 6: Final answer
    x = 3,942.75

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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.