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Finding the Fourth Proportional to 6,638.80, 9,945.84 and 4,529.20

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Solution

The fourth proportional to 6,638.80, 9,945.84 and 4,529.20 is: 6,785.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.80 : 9,945.84 = 4,529.20 : x
  2. Step 2: Convert to fraction form
    6,638.80/9,945.84 = 4,529.20/x
  3. Step 3: Cross multiply
    6,638.80x = 9,945.84 × 4,529.20
  4. Step 4: Simplify right side
    6,638.80x = 45,046,698.53
  5. Step 5: Solve for x
    x = 45,046,698.53/6,638.80
  6. Step 6: Final answer
    x = 6,785.37

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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.