Home / 7,831.76-11,749.20-2,639.12

Finding the Fourth Proportional to 7,831.76, 11,749.20 and 2,639.12

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Solution

The fourth proportional to 7,831.76, 11,749.20 and 2,639.12 is: 3,959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,831.76 : 11,749.20 = 2,639.12 : x
  2. Step 2: Convert to fraction form
    7,831.76/11,749.20 = 2,639.12/x
  3. Step 3: Cross multiply
    7,831.76x = 11,749.20 × 2,639.12
  4. Step 4: Simplify right side
    7,831.76x = 31,007,548.70
  5. Step 5: Solve for x
    x = 31,007,548.70/7,831.76
  6. Step 6: Final answer
    x = 3,959.21

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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.