Home / 9,190.40-12,682.32-5,211.20

Finding the Fourth Proportional to 9,190.40, 12,682.32 and 5,211.20

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Solution

The fourth proportional to 9,190.40, 12,682.32 and 5,211.20 is: 7,191.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,190.40 : 12,682.32 = 5,211.20 : x
  2. Step 2: Convert to fraction form
    9,190.40/12,682.32 = 5,211.20/x
  3. Step 3: Cross multiply
    9,190.40x = 12,682.32 × 5,211.20
  4. Step 4: Simplify right side
    9,190.40x = 66,090,105.98
  5. Step 5: Solve for x
    x = 66,090,105.98/9,190.40
  6. Step 6: Final answer
    x = 7,191.21

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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.