Home / 5,638.08-7,781.22-3,120.96

Finding the Fourth Proportional to 5,638.08, 7,781.22 and 3,120.96

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Solution

The fourth proportional to 5,638.08, 7,781.22 and 3,120.96 is: 4,307.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.08 : 7,781.22 = 3,120.96 : x
  2. Step 2: Convert to fraction form
    5,638.08/7,781.22 = 3,120.96/x
  3. Step 3: Cross multiply
    5,638.08x = 7,781.22 × 3,120.96
  4. Step 4: Simplify right side
    5,638.08x = 24,284,876.37
  5. Step 5: Solve for x
    x = 24,284,876.37/5,638.08
  6. Step 6: Final answer
    x = 4,307.30

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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.