Home / 5,638.72-7,781.23-3,120.93

Finding the Fourth Proportional to 5,638.72, 7,781.23 and 3,120.93

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Solution

The fourth proportional to 5,638.72, 7,781.23 and 3,120.93 is: 4,306.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.72 : 7,781.23 = 3,120.93 : x
  2. Step 2: Convert to fraction form
    5,638.72/7,781.23 = 3,120.93/x
  3. Step 3: Cross multiply
    5,638.72x = 7,781.23 × 3,120.93
  4. Step 4: Simplify right side
    5,638.72x = 24,284,674.14
  5. Step 5: Solve for x
    x = 24,284,674.14/5,638.72
  6. Step 6: Final answer
    x = 4,306.77

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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.