Home / 20,727.63-28,608.75-13,172.49

Finding the Fourth Proportional to 20,727.63, 28,608.75 and 13,172.49

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Solution

The fourth proportional to 20,727.63, 28,608.75 and 13,172.49 is: 18,180.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.63 : 28,608.75 = 13,172.49 : x
  2. Step 2: Convert to fraction form
    20,727.63/28,608.75 = 13,172.49/x
  3. Step 3: Cross multiply
    20,727.63x = 28,608.75 × 13,172.49
  4. Step 4: Simplify right side
    20,727.63x = 376,848,473.29
  5. Step 5: Solve for x
    x = 376,848,473.29/20,727.63
  6. Step 6: Final answer
    x = 18,180.97

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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.