Home / 20,837.82-28,756.19-11,406.38

Finding the Fourth Proportional to 20,837.82, 28,756.19 and 11,406.38

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Solution

The fourth proportional to 20,837.82, 28,756.19 and 11,406.38 is: 15,740.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.82 : 28,756.19 = 11,406.38 : x
  2. Step 2: Convert to fraction form
    20,837.82/28,756.19 = 11,406.38/x
  3. Step 3: Cross multiply
    20,837.82x = 28,756.19 × 11,406.38
  4. Step 4: Simplify right side
    20,837.82x = 328,003,829.68
  5. Step 5: Solve for x
    x = 328,003,829.68/20,837.82
  6. Step 6: Final answer
    x = 15,740.79

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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.