Home / 31,818.36-43,911.70-19,721.22

Finding the Fourth Proportional to 31,818.36, 43,911.70 and 19,721.22

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Solution

The fourth proportional to 31,818.36, 43,911.70 and 19,721.22 is: 27,216.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,818.36 : 43,911.70 = 19,721.22 : x
  2. Step 2: Convert to fraction form
    31,818.36/43,911.70 = 19,721.22/x
  3. Step 3: Cross multiply
    31,818.36x = 43,911.70 × 19,721.22
  4. Step 4: Simplify right side
    31,818.36x = 865,992,296.27
  5. Step 5: Solve for x
    x = 865,992,296.27/31,818.36
  6. Step 6: Final answer
    x = 27,216.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.