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Finding the Fourth Proportional to 13,881.33, 20,831.22 and 6,486.37

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Solution

The fourth proportional to 13,881.33, 20,831.22 and 6,486.37 is: 9,733.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.33 : 20,831.22 = 6,486.37 : x
  2. Step 2: Convert to fraction form
    13,881.33/20,831.22 = 6,486.37/x
  3. Step 3: Cross multiply
    13,881.33x = 20,831.22 × 6,486.37
  4. Step 4: Simplify right side
    13,881.33x = 135,118,948.39
  5. Step 5: Solve for x
    x = 135,118,948.39/13,881.33
  6. Step 6: Final answer
    x = 9,733.86

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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.