Home / 21,881.21-30,196.66-13,383.19

Finding the Fourth Proportional to 21,881.21, 30,196.66 and 13,383.19

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Solution

The fourth proportional to 21,881.21, 30,196.66 and 13,383.19 is: 18,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.21 : 30,196.66 = 13,383.19 : x
  2. Step 2: Convert to fraction form
    21,881.21/30,196.66 = 13,383.19/x
  3. Step 3: Cross multiply
    21,881.21x = 30,196.66 × 13,383.19
  4. Step 4: Simplify right side
    21,881.21x = 404,127,487.16
  5. Step 5: Solve for x
    x = 404,127,487.16/21,881.21
  6. Step 6: Final answer
    x = 18,469.16

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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.