Home / 7,121.04-9,831.24-5,136.72

Finding the Fourth Proportional to 7,121.04, 9,831.24 and 5,136.72

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Solution

The fourth proportional to 7,121.04, 9,831.24 and 5,136.72 is: 7,091.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.04 : 9,831.24 = 5,136.72 : x
  2. Step 2: Convert to fraction form
    7,121.04/9,831.24 = 5,136.72/x
  3. Step 3: Cross multiply
    7,121.04x = 9,831.24 × 5,136.72
  4. Step 4: Simplify right side
    7,121.04x = 50,500,327.13
  5. Step 5: Solve for x
    x = 50,500,327.13/7,121.04
  6. Step 6: Final answer
    x = 7,091.71

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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.