Home / 7,872.20-11,808.10-3,190.96

Finding the Fourth Proportional to 7,872.20, 11,808.10 and 3,190.96

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Solution

The fourth proportional to 7,872.20, 11,808.10 and 3,190.96 is: 4,786.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.20 : 11,808.10 = 3,190.96 : x
  2. Step 2: Convert to fraction form
    7,872.20/11,808.10 = 3,190.96/x
  3. Step 3: Cross multiply
    7,872.20x = 11,808.10 × 3,190.96
  4. Step 4: Simplify right side
    7,872.20x = 37,679,127.10
  5. Step 5: Solve for x
    x = 37,679,127.10/7,872.20
  6. Step 6: Final answer
    x = 4,786.35

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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.