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Finding the Fourth Proportional to 6,620.70, 9,931.36 and 3,696.78

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Solution

The fourth proportional to 6,620.70, 9,931.36 and 3,696.78 is: 5,545.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.70 : 9,931.36 = 3,696.78 : x
  2. Step 2: Convert to fraction form
    6,620.70/9,931.36 = 3,696.78/x
  3. Step 3: Cross multiply
    6,620.70x = 9,931.36 × 3,696.78
  4. Step 4: Simplify right side
    6,620.70x = 36,714,053.02
  5. Step 5: Solve for x
    x = 36,714,053.02/6,620.70
  6. Step 6: Final answer
    x = 5,545.34

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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.