Home / 21,913.87-30,241.34-20,239.60

Finding the Fourth Proportional to 21,913.87, 30,241.34 and 20,239.60

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Solution

The fourth proportional to 21,913.87, 30,241.34 and 20,239.60 is: 27,930.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.87 : 30,241.34 = 20,239.60 : x
  2. Step 2: Convert to fraction form
    21,913.87/30,241.34 = 20,239.60/x
  3. Step 3: Cross multiply
    21,913.87x = 30,241.34 × 20,239.60
  4. Step 4: Simplify right side
    21,913.87x = 612,072,625.06
  5. Step 5: Solve for x
    x = 612,072,625.06/21,913.87
  6. Step 6: Final answer
    x = 27,930.83

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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.