Home / 21,165.26-31,749.62-10,629.86

Finding the Fourth Proportional to 21,165.26, 31,749.62 and 10,629.86

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Solution

The fourth proportional to 21,165.26, 31,749.62 and 10,629.86 is: 15,945.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.26 : 31,749.62 = 10,629.86 : x
  2. Step 2: Convert to fraction form
    21,165.26/31,749.62 = 10,629.86/x
  3. Step 3: Cross multiply
    21,165.26x = 31,749.62 × 10,629.86
  4. Step 4: Simplify right side
    21,165.26x = 337,494,081.74
  5. Step 5: Solve for x
    x = 337,494,081.74/21,165.26
  6. Step 6: Final answer
    x = 15,945.66

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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.