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Finding the Fourth Proportional to 6,640.81, 9,158.34 and 5,525.44

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Solution

The fourth proportional to 6,640.81, 9,158.34 and 5,525.44 is: 7,620.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.81 : 9,158.34 = 5,525.44 : x
  2. Step 2: Convert to fraction form
    6,640.81/9,158.34 = 5,525.44/x
  3. Step 3: Cross multiply
    6,640.81x = 9,158.34 × 5,525.44
  4. Step 4: Simplify right side
    6,640.81x = 50,603,858.17
  5. Step 5: Solve for x
    x = 50,603,858.17/6,640.81
  6. Step 6: Final answer
    x = 7,620.13

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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.