Home / 21,126.78-31,667.34-13,736.52

Finding the Fourth Proportional to 21,126.78, 31,667.34 and 13,736.52

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Solution

The fourth proportional to 21,126.78, 31,667.34 and 13,736.52 is: 20,589.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.78 : 31,667.34 = 13,736.52 : x
  2. Step 2: Convert to fraction form
    21,126.78/31,667.34 = 13,736.52/x
  3. Step 3: Cross multiply
    21,126.78x = 31,667.34 × 13,736.52
  4. Step 4: Simplify right side
    21,126.78x = 434,999,049.26
  5. Step 5: Solve for x
    x = 434,999,049.26/21,126.78
  6. Step 6: Final answer
    x = 20,589.94

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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.