Home / 20,750.91-31,125.61-11,395.31

Finding the Fourth Proportional to 20,750.91, 31,125.61 and 11,395.31

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Solution

The fourth proportional to 20,750.91, 31,125.61 and 11,395.31 is: 17,092.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.91 : 31,125.61 = 11,395.31 : x
  2. Step 2: Convert to fraction form
    20,750.91/31,125.61 = 11,395.31/x
  3. Step 3: Cross multiply
    20,750.91x = 31,125.61 × 11,395.31
  4. Step 4: Simplify right side
    20,750.91x = 354,685,917.91
  5. Step 5: Solve for x
    x = 354,685,917.91/20,750.91
  6. Step 6: Final answer
    x = 17,092.55

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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.