Home / 39,722.88-54,818.03-21,818.31

Finding the Fourth Proportional to 39,722.88, 54,818.03 and 21,818.31

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Solution

The fourth proportional to 39,722.88, 54,818.03 and 21,818.31 is: 30,109.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,722.88 : 54,818.03 = 21,818.31 : x
  2. Step 2: Convert to fraction form
    39,722.88/54,818.03 = 21,818.31/x
  3. Step 3: Cross multiply
    39,722.88x = 54,818.03 × 21,818.31
  4. Step 4: Simplify right side
    39,722.88x = 1,196,036,772.13
  5. Step 5: Solve for x
    x = 1,196,036,772.13/39,722.88
  6. Step 6: Final answer
    x = 30,109.52

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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.