Home / 39,721.80-54,816.26-21,818.44

Finding the Fourth Proportional to 39,721.80, 54,816.26 and 21,818.44

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Solution

The fourth proportional to 39,721.80, 54,816.26 and 21,818.44 is: 30,109.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.80 : 54,816.26 = 21,818.44 : x
  2. Step 2: Convert to fraction form
    39,721.80/54,816.26 = 21,818.44/x
  3. Step 3: Cross multiply
    39,721.80x = 54,816.26 × 21,818.44
  4. Step 4: Simplify right side
    39,721.80x = 1,196,005,279.83
  5. Step 5: Solve for x
    x = 1,196,005,279.83/39,721.80
  6. Step 6: Final answer
    x = 30,109.54

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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.