Home / 21,591.36-29,796.66-13,203

Finding the Fourth Proportional to 21,591.36, 29,796.66 and 13,203

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Solution

The fourth proportional to 21,591.36, 29,796.66 and 13,203 is: 18,220.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.36 : 29,796.66 = 13,203 : x
  2. Step 2: Convert to fraction form
    21,591.36/29,796.66 = 13,203/x
  3. Step 3: Cross multiply
    21,591.36x = 29,796.66 × 13,203
  4. Step 4: Simplify right side
    21,591.36x = 393,405,301.98
  5. Step 5: Solve for x
    x = 393,405,301.98/21,591.36
  6. Step 6: Final answer
    x = 18,220.50

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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.