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Finding the Fourth Proportional to 6,761.68, 10,143.09 and 1,831.21

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Solution

The fourth proportional to 6,761.68, 10,143.09 and 1,831.21 is: 2,746.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,761.68 : 10,143.09 = 1,831.21 : x
  2. Step 2: Convert to fraction form
    6,761.68/10,143.09 = 1,831.21/x
  3. Step 3: Cross multiply
    6,761.68x = 10,143.09 × 1,831.21
  4. Step 4: Simplify right side
    6,761.68x = 18,574,102.48
  5. Step 5: Solve for x
    x = 18,574,102.48/6,761.68
  6. Step 6: Final answer
    x = 2,746.97

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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.