Home / 28,374.66-39,139.29-20,404.26

Finding the Fourth Proportional to 28,374.66, 39,139.29 and 20,404.26

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Solution

The fourth proportional to 28,374.66, 39,139.29 and 20,404.26 is: 28,145.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374.66 : 39,139.29 = 20,404.26 : x
  2. Step 2: Convert to fraction form
    28,374.66/39,139.29 = 20,404.26/x
  3. Step 3: Cross multiply
    28,374.66x = 39,139.29 × 20,404.26
  4. Step 4: Simplify right side
    28,374.66x = 798,608,249.38
  5. Step 5: Solve for x
    x = 798,608,249.38/28,374.66
  6. Step 6: Final answer
    x = 28,145.12

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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.