Home / 20,843.19-28,765.13-13,757.31

Finding the Fourth Proportional to 20,843.19, 28,765.13 and 13,757.31

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Solution

The fourth proportional to 20,843.19, 28,765.13 and 13,757.31 is: 18,986.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.19 : 28,765.13 = 13,757.31 : x
  2. Step 2: Convert to fraction form
    20,843.19/28,765.13 = 13,757.31/x
  3. Step 3: Cross multiply
    20,843.19x = 28,765.13 × 13,757.31
  4. Step 4: Simplify right side
    20,843.19x = 395,730,741.81
  5. Step 5: Solve for x
    x = 395,730,741.81/20,843.19
  6. Step 6: Final answer
    x = 18,986.09

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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.