Home / 12,138.07-18,183.79-7,444.40

Finding the Fourth Proportional to 12,138.07, 18,183.79 and 7,444.40

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Solution

The fourth proportional to 12,138.07, 18,183.79 and 7,444.40 is: 11,152.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.07 : 18,183.79 = 7,444.40 : x
  2. Step 2: Convert to fraction form
    12,138.07/18,183.79 = 7,444.40/x
  3. Step 3: Cross multiply
    12,138.07x = 18,183.79 × 7,444.40
  4. Step 4: Simplify right side
    12,138.07x = 135,367,406.28
  5. Step 5: Solve for x
    x = 135,367,406.28/12,138.07
  6. Step 6: Final answer
    x = 11,152.30

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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.