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Finding the Fourth Proportional to 6,628.28, 9,939.96 and 1,947

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Solution

The fourth proportional to 6,628.28, 9,939.96 and 1,947 is: 2,919.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628.28 : 9,939.96 = 1,947 : x
  2. Step 2: Convert to fraction form
    6,628.28/9,939.96 = 1,947/x
  3. Step 3: Cross multiply
    6,628.28x = 9,939.96 × 1,947
  4. Step 4: Simplify right side
    6,628.28x = 19,353,102.12
  5. Step 5: Solve for x
    x = 19,353,102.12/6,628.28
  6. Step 6: Final answer
    x = 2,919.78

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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.