Home / 3,919.69-5,409.06-2,151.46

Finding the Fourth Proportional to 3,919.69, 5,409.06 and 2,151.46

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Solution

The fourth proportional to 3,919.69, 5,409.06 and 2,151.46 is: 2,968.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.69 : 5,409.06 = 2,151.46 : x
  2. Step 2: Convert to fraction form
    3,919.69/5,409.06 = 2,151.46/x
  3. Step 3: Cross multiply
    3,919.69x = 5,409.06 × 2,151.46
  4. Step 4: Simplify right side
    3,919.69x = 11,637,349.18
  5. Step 5: Solve for x
    x = 11,637,349.18/3,919.69
  6. Step 6: Final answer
    x = 2,968.95

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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.