Home / 21,179.85-31,749.12-10,083.56

Finding the Fourth Proportional to 21,179.85, 31,749.12 and 10,083.56

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Solution

The fourth proportional to 21,179.85, 31,749.12 and 10,083.56 is: 15,115.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.85 : 31,749.12 = 10,083.56 : x
  2. Step 2: Convert to fraction form
    21,179.85/31,749.12 = 10,083.56/x
  3. Step 3: Cross multiply
    21,179.85x = 31,749.12 × 10,083.56
  4. Step 4: Simplify right side
    21,179.85x = 320,143,997.72
  5. Step 5: Solve for x
    x = 320,143,997.72/21,179.85
  6. Step 6: Final answer
    x = 15,115.50

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1.5x scale

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.