Home / 20,429.66-28,194.96-13,729.23

Finding the Fourth Proportional to 20,429.66, 28,194.96 and 13,729.23

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Solution

The fourth proportional to 20,429.66, 28,194.96 and 13,729.23 is: 18,947.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.66 : 28,194.96 = 13,729.23 : x
  2. Step 2: Convert to fraction form
    20,429.66/28,194.96 = 13,729.23/x
  3. Step 3: Cross multiply
    20,429.66x = 28,194.96 × 13,729.23
  4. Step 4: Simplify right side
    20,429.66x = 387,095,090.68
  5. Step 5: Solve for x
    x = 387,095,090.68/20,429.66
  6. Step 6: Final answer
    x = 18,947.71

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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.