Home / 2,821.55-3,893.76-1,643.30

Finding the Fourth Proportional to 2,821.55, 3,893.76 and 1,643.30

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Solution

The fourth proportional to 2,821.55, 3,893.76 and 1,643.30 is: 2,267.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.55 : 3,893.76 = 1,643.30 : x
  2. Step 2: Convert to fraction form
    2,821.55/3,893.76 = 1,643.30/x
  3. Step 3: Cross multiply
    2,821.55x = 3,893.76 × 1,643.30
  4. Step 4: Simplify right side
    2,821.55x = 6,398,596.34
  5. Step 5: Solve for x
    x = 6,398,596.34/2,821.55
  6. Step 6: Final answer
    x = 2,267.76

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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.