Home / 7,747.80-11,621.70-3,129.72

Finding the Fourth Proportional to 7,747.80, 11,621.70 and 3,129.72

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Solution

The fourth proportional to 7,747.80, 11,621.70 and 3,129.72 is: 4,694.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,747.80 : 11,621.70 = 3,129.72 : x
  2. Step 2: Convert to fraction form
    7,747.80/11,621.70 = 3,129.72/x
  3. Step 3: Cross multiply
    7,747.80x = 11,621.70 × 3,129.72
  4. Step 4: Simplify right side
    7,747.80x = 36,372,666.92
  5. Step 5: Solve for x
    x = 36,372,666.92/7,747.80
  6. Step 6: Final answer
    x = 4,694.58

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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.