Home / 13,183.74-18,188.46-8,139.20

Finding the Fourth Proportional to 13,183.74, 18,188.46 and 8,139.20

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Solution

The fourth proportional to 13,183.74, 18,188.46 and 8,139.20 is: 11,228.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,183.74 : 18,188.46 = 8,139.20 : x
  2. Step 2: Convert to fraction form
    13,183.74/18,188.46 = 8,139.20/x
  3. Step 3: Cross multiply
    13,183.74x = 18,188.46 × 8,139.20
  4. Step 4: Simplify right side
    13,183.74x = 148,039,422.69
  5. Step 5: Solve for x
    x = 148,039,422.69/13,183.74
  6. Step 6: Final answer
    x = 11,228.94

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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.