Home / 5,121.86-7,068.30-2,883.81

Finding the Fourth Proportional to 5,121.86, 7,068.30 and 2,883.81

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Solution

The fourth proportional to 5,121.86, 7,068.30 and 2,883.81 is: 3,979.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.86 : 7,068.30 = 2,883.81 : x
  2. Step 2: Convert to fraction form
    5,121.86/7,068.30 = 2,883.81/x
  3. Step 3: Cross multiply
    5,121.86x = 7,068.30 × 2,883.81
  4. Step 4: Simplify right side
    5,121.86x = 20,383,634.22
  5. Step 5: Solve for x
    x = 20,383,634.22/5,121.86
  6. Step 6: Final answer
    x = 3,979.74

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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.