Home / 2,817.36-3,887.56-1,638.16

Finding the Fourth Proportional to 2,817.36, 3,887.56 and 1,638.16

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Solution

The fourth proportional to 2,817.36, 3,887.56 and 1,638.16 is: 2,260.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.36 : 3,887.56 = 1,638.16 : x
  2. Step 2: Convert to fraction form
    2,817.36/3,887.56 = 1,638.16/x
  3. Step 3: Cross multiply
    2,817.36x = 3,887.56 × 1,638.16
  4. Step 4: Simplify right side
    2,817.36x = 6,368,445.29
  5. Step 5: Solve for x
    x = 6,368,445.29/2,817.36
  6. Step 6: Final answer
    x = 2,260.43

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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.