Home / 20,377.68-28,127.20-13,305.20

Finding the Fourth Proportional to 20,377.68, 28,127.20 and 13,305.20

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Solution

The fourth proportional to 20,377.68, 28,127.20 and 13,305.20 is: 18,365.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.68 : 28,127.20 = 13,305.20 : x
  2. Step 2: Convert to fraction form
    20,377.68/28,127.20 = 13,305.20/x
  3. Step 3: Cross multiply
    20,377.68x = 28,127.20 × 13,305.20
  4. Step 4: Simplify right side
    20,377.68x = 374,238,021.44
  5. Step 5: Solve for x
    x = 374,238,021.44/20,377.68
  6. Step 6: Final answer
    x = 18,365.09

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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.