Home / 7,122.47-9,831.72-6,375.09

Finding the Fourth Proportional to 7,122.47, 9,831.72 and 6,375.09

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Solution

The fourth proportional to 7,122.47, 9,831.72 and 6,375.09 is: 8,800.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.47 : 9,831.72 = 6,375.09 : x
  2. Step 2: Convert to fraction form
    7,122.47/9,831.72 = 6,375.09/x
  3. Step 3: Cross multiply
    7,122.47x = 9,831.72 × 6,375.09
  4. Step 4: Simplify right side
    7,122.47x = 62,678,099.85
  5. Step 5: Solve for x
    x = 62,678,099.85/7,122.47
  6. Step 6: Final answer
    x = 8,800.06

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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.