Home / 18,120.67-27,145.61-12,485.05

Finding the Fourth Proportional to 18,120.67, 27,145.61 and 12,485.05

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Solution

The fourth proportional to 18,120.67, 27,145.61 and 12,485.05 is: 18,703.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.67 : 27,145.61 = 12,485.05 : x
  2. Step 2: Convert to fraction form
    18,120.67/27,145.61 = 12,485.05/x
  3. Step 3: Cross multiply
    18,120.67x = 27,145.61 × 12,485.05
  4. Step 4: Simplify right side
    18,120.67x = 338,914,099.98
  5. Step 5: Solve for x
    x = 338,914,099.98/18,120.67
  6. Step 6: Final answer
    x = 18,703.18

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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.