Home / 3,995.52-5,518.74-2,821.86

Finding the Fourth Proportional to 3,995.52, 5,518.74 and 2,821.86

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Solution

The fourth proportional to 3,995.52, 5,518.74 and 2,821.86 is: 3,897.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.52 : 5,518.74 = 2,821.86 : x
  2. Step 2: Convert to fraction form
    3,995.52/5,518.74 = 2,821.86/x
  3. Step 3: Cross multiply
    3,995.52x = 5,518.74 × 2,821.86
  4. Step 4: Simplify right side
    3,995.52x = 15,573,111.66
  5. Step 5: Solve for x
    x = 15,573,111.66/3,995.52
  6. Step 6: Final answer
    x = 3,897.64

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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.