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Finding the Fourth Proportional to 6,601.60, 9,921.60 and 5,756.80

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Solution

The fourth proportional to 6,601.60, 9,921.60 and 5,756.80 is: 8,651.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,601.60 : 9,921.60 = 5,756.80 : x
  2. Step 2: Convert to fraction form
    6,601.60/9,921.60 = 5,756.80/x
  3. Step 3: Cross multiply
    6,601.60x = 9,921.60 × 5,756.80
  4. Step 4: Simplify right side
    6,601.60x = 57,116,666.88
  5. Step 5: Solve for x
    x = 57,116,666.88/6,601.60
  6. Step 6: Final answer
    x = 8,651.94

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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.