Home / 4,939.90-7,415.64-3,900.60

Finding the Fourth Proportional to 4,939.90, 7,415.64 and 3,900.60

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Solution

The fourth proportional to 4,939.90, 7,415.64 and 3,900.60 is: 5,855.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,939.90 : 7,415.64 = 3,900.60 : x
  2. Step 2: Convert to fraction form
    4,939.90/7,415.64 = 3,900.60/x
  3. Step 3: Cross multiply
    4,939.90x = 7,415.64 × 3,900.60
  4. Step 4: Simplify right side
    4,939.90x = 28,925,454.17
  5. Step 5: Solve for x
    x = 28,925,454.17/4,939.90
  6. Step 6: Final answer
    x = 5,855.47

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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.