Home / 5,638.12-7,780.26-3,119.56

Finding the Fourth Proportional to 5,638.12, 7,780.26 and 3,119.56

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Solution

The fourth proportional to 5,638.12, 7,780.26 and 3,119.56 is: 4,304.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.12 : 7,780.26 = 3,119.56 : x
  2. Step 2: Convert to fraction form
    5,638.12/7,780.26 = 3,119.56/x
  3. Step 3: Cross multiply
    5,638.12x = 7,780.26 × 3,119.56
  4. Step 4: Simplify right side
    5,638.12x = 24,270,987.89
  5. Step 5: Solve for x
    x = 24,270,987.89/5,638.12
  6. Step 6: Final answer
    x = 4,304.80

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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.