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Finding the Fourth Proportional to 11,758.45, 17,621.79 and 6,485.56

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Solution

The fourth proportional to 11,758.45, 17,621.79 and 6,485.56 is: 9,719.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,758.45 : 17,621.79 = 6,485.56 : x
  2. Step 2: Convert to fraction form
    11,758.45/17,621.79 = 6,485.56/x
  3. Step 3: Cross multiply
    11,758.45x = 17,621.79 × 6,485.56
  4. Step 4: Simplify right side
    11,758.45x = 114,287,157.54
  5. Step 5: Solve for x
    x = 114,287,157.54/11,758.45
  6. Step 6: Final answer
    x = 9,719.57

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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.