Home / 3,939.76-5,909.64-1,018.36

Finding the Fourth Proportional to 3,939.76, 5,909.64 and 1,018.36

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Solution

The fourth proportional to 3,939.76, 5,909.64 and 1,018.36 is: 1,527.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.76 : 5,909.64 = 1,018.36 : x
  2. Step 2: Convert to fraction form
    3,939.76/5,909.64 = 1,018.36/x
  3. Step 3: Cross multiply
    3,939.76x = 5,909.64 × 1,018.36
  4. Step 4: Simplify right side
    3,939.76x = 6,018,140.99
  5. Step 5: Solve for x
    x = 6,018,140.99/3,939.76
  6. Step 6: Final answer
    x = 1,527.54

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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.