Home / 20,727.73-28,608.88-13,172.58

Finding the Fourth Proportional to 20,727.73, 28,608.88 and 13,172.58

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Solution

The fourth proportional to 20,727.73, 28,608.88 and 13,172.58 is: 18,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.73 : 28,608.88 = 13,172.58 : x
  2. Step 2: Convert to fraction form
    20,727.73/28,608.88 = 13,172.58/x
  3. Step 3: Cross multiply
    20,727.73x = 28,608.88 × 13,172.58
  4. Step 4: Simplify right side
    20,727.73x = 376,852,884.26
  5. Step 5: Solve for x
    x = 376,852,884.26/20,727.73
  6. Step 6: Final answer
    x = 18,181.10

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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.