Home / 21,164.91-31,719.51-11,809.33

Finding the Fourth Proportional to 21,164.91, 31,719.51 and 11,809.33

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Solution

The fourth proportional to 21,164.91, 31,719.51 and 11,809.33 is: 17,698.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,164.91 : 31,719.51 = 11,809.33 : x
  2. Step 2: Convert to fraction form
    21,164.91/31,719.51 = 11,809.33/x
  3. Step 3: Cross multiply
    21,164.91x = 31,719.51 × 11,809.33
  4. Step 4: Simplify right side
    21,164.91x = 374,586,101.98
  5. Step 5: Solve for x
    x = 374,586,101.98/21,164.91
  6. Step 6: Final answer
    x = 17,698.45

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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.