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Finding the Fourth Proportional to 8,485.58, 11,712.81 and 4,949.48

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Solution

The fourth proportional to 8,485.58, 11,712.81 and 4,949.48 is: 6,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.58 : 11,712.81 = 4,949.48 : x
  2. Step 2: Convert to fraction form
    8,485.58/11,712.81 = 4,949.48/x
  3. Step 3: Cross multiply
    8,485.58x = 11,712.81 × 4,949.48
  4. Step 4: Simplify right side
    8,485.58x = 57,972,260.27
  5. Step 5: Solve for x
    x = 57,972,260.27/8,485.58
  6. Step 6: Final answer
    x = 6,831.86

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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.