Home / 20,727.35-28,608.36-13,172.21

Finding the Fourth Proportional to 20,727.35, 28,608.36 and 13,172.21

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Solution

The fourth proportional to 20,727.35, 28,608.36 and 13,172.21 is: 18,180.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.35 : 28,608.36 = 13,172.21 : x
  2. Step 2: Convert to fraction form
    20,727.35/28,608.36 = 13,172.21/x
  3. Step 3: Cross multiply
    20,727.35x = 28,608.36 × 13,172.21
  4. Step 4: Simplify right side
    20,727.35x = 376,835,314.61
  5. Step 5: Solve for x
    x = 376,835,314.61/20,727.35
  6. Step 6: Final answer
    x = 18,180.58

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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.