Home / 3,992.21-5,509.77-2,876.84

Finding the Fourth Proportional to 3,992.21, 5,509.77 and 2,876.84

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Solution

The fourth proportional to 3,992.21, 5,509.77 and 2,876.84 is: 3,970.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.21 : 5,509.77 = 2,876.84 : x
  2. Step 2: Convert to fraction form
    3,992.21/5,509.77 = 2,876.84/x
  3. Step 3: Cross multiply
    3,992.21x = 5,509.77 × 2,876.84
  4. Step 4: Simplify right side
    3,992.21x = 15,850,699.18
  5. Step 5: Solve for x
    x = 15,850,699.18/3,992.21
  6. Step 6: Final answer
    x = 3,970.41

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1.5x scale

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.