Home / 3,939.18-5,905.53-1,858.11

Finding the Fourth Proportional to 3,939.18, 5,905.53 and 1,858.11

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Solution

The fourth proportional to 3,939.18, 5,905.53 and 1,858.11 is: 2,785.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.18 : 5,905.53 = 1,858.11 : x
  2. Step 2: Convert to fraction form
    3,939.18/5,905.53 = 1,858.11/x
  3. Step 3: Cross multiply
    3,939.18x = 5,905.53 × 1,858.11
  4. Step 4: Simplify right side
    3,939.18x = 10,973,124.35
  5. Step 5: Solve for x
    x = 10,973,124.35/3,939.18
  6. Step 6: Final answer
    x = 2,785.64

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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.