Home / 21,171.96-29,203.98-13,719.48

Finding the Fourth Proportional to 21,171.96, 29,203.98 and 13,719.48

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Solution

The fourth proportional to 21,171.96, 29,203.98 and 13,719.48 is: 18,924.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.96 : 29,203.98 = 13,719.48 : x
  2. Step 2: Convert to fraction form
    21,171.96/29,203.98 = 13,719.48/x
  3. Step 3: Cross multiply
    21,171.96x = 29,203.98 × 13,719.48
  4. Step 4: Simplify right side
    21,171.96x = 400,663,419.53
  5. Step 5: Solve for x
    x = 400,663,419.53/21,171.96
  6. Step 6: Final answer
    x = 18,924.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.