Home / 20,837.19-28,756.85-13,751.31

Finding the Fourth Proportional to 20,837.19, 28,756.85 and 13,751.31

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Solution

The fourth proportional to 20,837.19, 28,756.85 and 13,751.31 is: 18,977.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.19 : 28,756.85 = 13,751.31 : x
  2. Step 2: Convert to fraction form
    20,837.19/28,756.85 = 13,751.31/x
  3. Step 3: Cross multiply
    20,837.19x = 28,756.85 × 13,751.31
  4. Step 4: Simplify right side
    20,837.19x = 395,444,290.22
  5. Step 5: Solve for x
    x = 395,444,290.22/20,837.19
  6. Step 6: Final answer
    x = 18,977.81

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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.