Home / 21,207.09-31,805.01-10,091.64

Finding the Fourth Proportional to 21,207.09, 31,805.01 and 10,091.64

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Solution

The fourth proportional to 21,207.09, 31,805.01 and 10,091.64 is: 15,134.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.09 : 31,805.01 = 10,091.64 : x
  2. Step 2: Convert to fraction form
    21,207.09/31,805.01 = 10,091.64/x
  3. Step 3: Cross multiply
    21,207.09x = 31,805.01 × 10,091.64
  4. Step 4: Simplify right side
    21,207.09x = 320,964,711.12
  5. Step 5: Solve for x
    x = 320,964,711.12/21,207.09
  6. Step 6: Final answer
    x = 15,134.78

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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.