Home / 28,107.05-38,734.38-20,135.43

Finding the Fourth Proportional to 28,107.05, 38,734.38 and 20,135.43

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Solution

The fourth proportional to 28,107.05, 38,734.38 and 20,135.43 is: 27,748.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.05 : 38,734.38 = 20,135.43 : x
  2. Step 2: Convert to fraction form
    28,107.05/38,734.38 = 20,135.43/x
  3. Step 3: Cross multiply
    28,107.05x = 38,734.38 × 20,135.43
  4. Step 4: Simplify right side
    28,107.05x = 779,933,397.08
  5. Step 5: Solve for x
    x = 779,933,397.08/28,107.05
  6. Step 6: Final answer
    x = 27,748.68

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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.