Home / 21,125.82-31,719.87-11,784.09

Finding the Fourth Proportional to 21,125.82, 31,719.87 and 11,784.09

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Solution

The fourth proportional to 21,125.82, 31,719.87 and 11,784.09 is: 17,693.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.82 : 31,719.87 = 11,784.09 : x
  2. Step 2: Convert to fraction form
    21,125.82/31,719.87 = 11,784.09/x
  3. Step 3: Cross multiply
    21,125.82x = 31,719.87 × 11,784.09
  4. Step 4: Simplify right side
    21,125.82x = 373,789,802.87
  5. Step 5: Solve for x
    x = 373,789,802.87/21,125.82
  6. Step 6: Final answer
    x = 17,693.51

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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.