Home / 2,817.13-3,887.82-1,638.20

Finding the Fourth Proportional to 2,817.13, 3,887.82 and 1,638.20

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Solution

The fourth proportional to 2,817.13, 3,887.82 and 1,638.20 is: 2,260.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.13 : 3,887.82 = 1,638.20 : x
  2. Step 2: Convert to fraction form
    2,817.13/3,887.82 = 1,638.20/x
  3. Step 3: Cross multiply
    2,817.13x = 3,887.82 × 1,638.20
  4. Step 4: Simplify right side
    2,817.13x = 6,369,026.72
  5. Step 5: Solve for x
    x = 6,369,026.72/2,817.13
  6. Step 6: Final answer
    x = 2,260.82

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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.