Home / 7,720.98-11,556.20-4,202.20

Finding the Fourth Proportional to 7,720.98, 11,556.20 and 4,202.20

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Solution

The fourth proportional to 7,720.98, 11,556.20 and 4,202.20 is: 6,289.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.98 : 11,556.20 = 4,202.20 : x
  2. Step 2: Convert to fraction form
    7,720.98/11,556.20 = 4,202.20/x
  3. Step 3: Cross multiply
    7,720.98x = 11,556.20 × 4,202.20
  4. Step 4: Simplify right side
    7,720.98x = 48,561,463.64
  5. Step 5: Solve for x
    x = 48,561,463.64/7,720.98
  6. Step 6: Final answer
    x = 6,289.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.