Home / 20,722.50-31,046.90-11,939.27

Finding the Fourth Proportional to 20,722.50, 31,046.90 and 11,939.27

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Solution

The fourth proportional to 20,722.50, 31,046.90 and 11,939.27 is: 17,887.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.50 : 31,046.90 = 11,939.27 : x
  2. Step 2: Convert to fraction form
    20,722.50/31,046.90 = 11,939.27/x
  3. Step 3: Cross multiply
    20,722.50x = 31,046.90 × 11,939.27
  4. Step 4: Simplify right side
    20,722.50x = 370,677,106.83
  5. Step 5: Solve for x
    x = 370,677,106.83/20,722.50
  6. Step 6: Final answer
    x = 17,887.66

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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.