Home / 2,820.09-3,887.23-2,221.64

Finding the Fourth Proportional to 2,820.09, 3,887.23 and 2,221.64

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Solution

The fourth proportional to 2,820.09, 3,887.23 and 2,221.64 is: 3,062.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.09 : 3,887.23 = 2,221.64 : x
  2. Step 2: Convert to fraction form
    2,820.09/3,887.23 = 2,221.64/x
  3. Step 3: Cross multiply
    2,820.09x = 3,887.23 × 2,221.64
  4. Step 4: Simplify right side
    2,820.09x = 8,636,025.66
  5. Step 5: Solve for x
    x = 8,636,025.66/2,820.09
  6. Step 6: Final answer
    x = 3,062.32

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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.