Home / 4,889.40-7,331.40-2,115.60

Finding the Fourth Proportional to 4,889.40, 7,331.40 and 2,115.60

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Solution

The fourth proportional to 4,889.40, 7,331.40 and 2,115.60 is: 3,172.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,889.40 : 7,331.40 = 2,115.60 : x
  2. Step 2: Convert to fraction form
    4,889.40/7,331.40 = 2,115.60/x
  3. Step 3: Cross multiply
    4,889.40x = 7,331.40 × 2,115.60
  4. Step 4: Simplify right side
    4,889.40x = 15,510,309.84
  5. Step 5: Solve for x
    x = 15,510,309.84/4,889.40
  6. Step 6: Final answer
    x = 3,172.23

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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.