Home / 21,109.97-31,642.17-13,719.74

Finding the Fourth Proportional to 21,109.97, 31,642.17 and 13,719.74

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Solution

The fourth proportional to 21,109.97, 31,642.17 and 13,719.74 is: 20,564.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.97 : 31,642.17 = 13,719.74 : x
  2. Step 2: Convert to fraction form
    21,109.97/31,642.17 = 13,719.74/x
  3. Step 3: Cross multiply
    21,109.97x = 31,642.17 × 13,719.74
  4. Step 4: Simplify right side
    21,109.97x = 434,122,345.44
  5. Step 5: Solve for x
    x = 434,122,345.44/21,109.97
  6. Step 6: Final answer
    x = 20,564.80

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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.