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Finding the Fourth Proportional to 6,600.80, 9,901.28 and 1,983.84

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Solution

The fourth proportional to 6,600.80, 9,901.28 and 1,983.84 is: 2,975.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,600.80 : 9,901.28 = 1,983.84 : x
  2. Step 2: Convert to fraction form
    6,600.80/9,901.28 = 1,983.84/x
  3. Step 3: Cross multiply
    6,600.80x = 9,901.28 × 1,983.84
  4. Step 4: Simplify right side
    6,600.80x = 19,642,555.32
  5. Step 5: Solve for x
    x = 19,642,555.32/6,600.80
  6. Step 6: Final answer
    x = 2,975.78

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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.