Home / 20,722.80-28,608-14,043.68

Finding the Fourth Proportional to 20,722.80, 28,608 and 14,043.68

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Solution

The fourth proportional to 20,722.80, 28,608 and 14,043.68 is: 19,387.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.80 : 28,608 = 14,043.68 : x
  2. Step 2: Convert to fraction form
    20,722.80/28,608 = 14,043.68/x
  3. Step 3: Cross multiply
    20,722.80x = 28,608 × 14,043.68
  4. Step 4: Simplify right side
    20,722.80x = 401,761,597.44
  5. Step 5: Solve for x
    x = 401,761,597.44/20,722.80
  6. Step 6: Final answer
    x = 19,387.42

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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.