Home / 21,316.14-31,983.42-11,443.88

Finding the Fourth Proportional to 21,316.14, 31,983.42 and 11,443.88

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Solution

The fourth proportional to 21,316.14, 31,983.42 and 11,443.88 is: 17,170.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.14 : 31,983.42 = 11,443.88 : x
  2. Step 2: Convert to fraction form
    21,316.14/31,983.42 = 11,443.88/x
  3. Step 3: Cross multiply
    21,316.14x = 31,983.42 × 11,443.88
  4. Step 4: Simplify right side
    21,316.14x = 366,014,420.47
  5. Step 5: Solve for x
    x = 366,014,420.47/21,316.14
  6. Step 6: Final answer
    x = 17,170.76

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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.