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Finding the Fourth Proportional to 7,576.68, 11,309.46 and 7,020.78

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Solution

The fourth proportional to 7,576.68, 11,309.46 and 7,020.78 is: 10,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,576.68 : 11,309.46 = 7,020.78 : x
  2. Step 2: Convert to fraction form
    7,576.68/11,309.46 = 7,020.78/x
  3. Step 3: Cross multiply
    7,576.68x = 11,309.46 × 7,020.78
  4. Step 4: Simplify right side
    7,576.68x = 79,401,230.58
  5. Step 5: Solve for x
    x = 79,401,230.58/7,576.68
  6. Step 6: Final answer
    x = 10,479.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.