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Finding the Fourth Proportional to 5,831.31, 8,047.41 and 3,178.81

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Solution

The fourth proportional to 5,831.31, 8,047.41 and 3,178.81 is: 4,386.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,831.31 : 8,047.41 = 3,178.81 : x
  2. Step 2: Convert to fraction form
    5,831.31/8,047.41 = 3,178.81/x
  3. Step 3: Cross multiply
    5,831.31x = 8,047.41 × 3,178.81
  4. Step 4: Simplify right side
    5,831.31x = 25,581,147.15
  5. Step 5: Solve for x
    x = 25,581,147.15/5,831.31
  6. Step 6: Final answer
    x = 4,386.86

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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.