Home / 7,621.80-11,440.88-6,749.70

Finding the Fourth Proportional to 7,621.80, 11,440.88 and 6,749.70

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Solution

The fourth proportional to 7,621.80, 11,440.88 and 6,749.70 is: 10,131.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.80 : 11,440.88 = 6,749.70 : x
  2. Step 2: Convert to fraction form
    7,621.80/11,440.88 = 6,749.70/x
  3. Step 3: Cross multiply
    7,621.80x = 11,440.88 × 6,749.70
  4. Step 4: Simplify right side
    7,621.80x = 77,222,507.74
  5. Step 5: Solve for x
    x = 77,222,507.74/7,621.80
  6. Step 6: Final answer
    x = 10,131.79

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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.