Home / 9,311.28-13,971.72-4,120.80

Finding the Fourth Proportional to 9,311.28, 13,971.72 and 4,120.80

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Solution

The fourth proportional to 9,311.28, 13,971.72 and 4,120.80 is: 6,183.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,311.28 : 13,971.72 = 4,120.80 : x
  2. Step 2: Convert to fraction form
    9,311.28/13,971.72 = 4,120.80/x
  3. Step 3: Cross multiply
    9,311.28x = 13,971.72 × 4,120.80
  4. Step 4: Simplify right side
    9,311.28x = 57,574,663.78
  5. Step 5: Solve for x
    x = 57,574,663.78/9,311.28
  6. Step 6: Final answer
    x = 6,183.32

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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.