Home / 7,831.45-11,747.72-3,151.50

Finding the Fourth Proportional to 7,831.45, 11,747.72 and 3,151.50

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Solution

The fourth proportional to 7,831.45, 11,747.72 and 3,151.50 is: 4,727.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,831.45 : 11,747.72 = 3,151.50 : x
  2. Step 2: Convert to fraction form
    7,831.45/11,747.72 = 3,151.50/x
  3. Step 3: Cross multiply
    7,831.45x = 11,747.72 × 3,151.50
  4. Step 4: Simplify right side
    7,831.45x = 37,022,956.79
  5. Step 5: Solve for x
    x = 37,022,956.79/7,831.45
  6. Step 6: Final answer
    x = 4,727.47

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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.