Home / 21,186.96-31,759.76-10,090.64

Finding the Fourth Proportional to 21,186.96, 31,759.76 and 10,090.64

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Solution

The fourth proportional to 21,186.96, 31,759.76 and 10,090.64 is: 15,126.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.96 : 31,759.76 = 10,090.64 : x
  2. Step 2: Convert to fraction form
    21,186.96/31,759.76 = 10,090.64/x
  3. Step 3: Cross multiply
    21,186.96x = 31,759.76 × 10,090.64
  4. Step 4: Simplify right side
    21,186.96x = 320,476,304.65
  5. Step 5: Solve for x
    x = 320,476,304.65/21,186.96
  6. Step 6: Final answer
    x = 15,126.11

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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.