Home / 3,039.60-4,212.28-2,981.28

Finding the Fourth Proportional to 3,039.60, 4,212.28 and 2,981.28

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Solution

The fourth proportional to 3,039.60, 4,212.28 and 2,981.28 is: 4,131.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,039.60 : 4,212.28 = 2,981.28 : x
  2. Step 2: Convert to fraction form
    3,039.60/4,212.28 = 2,981.28/x
  3. Step 3: Cross multiply
    3,039.60x = 4,212.28 × 2,981.28
  4. Step 4: Simplify right side
    3,039.60x = 12,557,986.12
  5. Step 5: Solve for x
    x = 12,557,986.12/3,039.60
  6. Step 6: Final answer
    x = 4,131.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.