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Finding the Fourth Proportional to 6,660, 9,190.80 and 3,865.50

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Solution

The fourth proportional to 6,660, 9,190.80 and 3,865.50 is: 5,334.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660 : 9,190.80 = 3,865.50 : x
  2. Step 2: Convert to fraction form
    6,660/9,190.80 = 3,865.50/x
  3. Step 3: Cross multiply
    6,660x = 9,190.80 × 3,865.50
  4. Step 4: Simplify right side
    6,660x = 35,527,037.40
  5. Step 5: Solve for x
    x = 35,527,037.40/6,660
  6. Step 6: Final answer
    x = 5,334.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.