Home / 8,639.87-12,963.44-5,136.56

Finding the Fourth Proportional to 8,639.87, 12,963.44 and 5,136.56

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Solution

The fourth proportional to 8,639.87, 12,963.44 and 5,136.56 is: 7,707.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.87 : 12,963.44 = 5,136.56 : x
  2. Step 2: Convert to fraction form
    8,639.87/12,963.44 = 5,136.56/x
  3. Step 3: Cross multiply
    8,639.87x = 12,963.44 × 5,136.56
  4. Step 4: Simplify right side
    8,639.87x = 66,587,556.92
  5. Step 5: Solve for x
    x = 66,587,556.92/8,639.87
  6. Step 6: Final answer
    x = 7,707.01

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1.5x scale

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.