Home / 20,788.19-31,192.82-9,101.51

Finding the Fourth Proportional to 20,788.19, 31,192.82 and 9,101.51

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Solution

The fourth proportional to 20,788.19, 31,192.82 and 9,101.51 is: 13,656.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.19 : 31,192.82 = 9,101.51 : x
  2. Step 2: Convert to fraction form
    20,788.19/31,192.82 = 9,101.51/x
  3. Step 3: Cross multiply
    20,788.19x = 31,192.82 × 9,101.51
  4. Step 4: Simplify right side
    20,788.19x = 283,901,717.65
  5. Step 5: Solve for x
    x = 283,901,717.65/20,788.19
  6. Step 6: Final answer
    x = 13,656.88

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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.