Home / 9,168.90-12,653.12-5,190.78

Finding the Fourth Proportional to 9,168.90, 12,653.12 and 5,190.78

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Solution

The fourth proportional to 9,168.90, 12,653.12 and 5,190.78 is: 7,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,168.90 : 12,653.12 = 5,190.78 : x
  2. Step 2: Convert to fraction form
    9,168.90/12,653.12 = 5,190.78/x
  3. Step 3: Cross multiply
    9,168.90x = 12,653.12 × 5,190.78
  4. Step 4: Simplify right side
    9,168.90x = 65,679,562.23
  5. Step 5: Solve for x
    x = 65,679,562.23/9,168.90
  6. Step 6: Final answer
    x = 7,163.30

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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.