Home / 20,888.82-31,316.79-10,351.60

Finding the Fourth Proportional to 20,888.82, 31,316.79 and 10,351.60

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Solution

The fourth proportional to 20,888.82, 31,316.79 and 10,351.60 is: 15,519.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.82 : 31,316.79 = 10,351.60 : x
  2. Step 2: Convert to fraction form
    20,888.82/31,316.79 = 10,351.60/x
  3. Step 3: Cross multiply
    20,888.82x = 31,316.79 × 10,351.60
  4. Step 4: Simplify right side
    20,888.82x = 324,178,843.89
  5. Step 5: Solve for x
    x = 324,178,843.89/20,888.82
  6. Step 6: Final answer
    x = 15,519.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.