Home / 2,981.39-4,112.24-2,421.86

Finding the Fourth Proportional to 2,981.39, 4,112.24 and 2,421.86

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Solution

The fourth proportional to 2,981.39, 4,112.24 and 2,421.86 is: 3,340.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.39 : 4,112.24 = 2,421.86 : x
  2. Step 2: Convert to fraction form
    2,981.39/4,112.24 = 2,421.86/x
  3. Step 3: Cross multiply
    2,981.39x = 4,112.24 × 2,421.86
  4. Step 4: Simplify right side
    2,981.39x = 9,959,236.90
  5. Step 5: Solve for x
    x = 9,959,236.90/2,981.39
  6. Step 6: Final answer
    x = 3,340.47

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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.