Home / 18,431.80-27,647.70-12,902.20

Finding the Fourth Proportional to 18,431.80, 27,647.70 and 12,902.20

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Solution

The fourth proportional to 18,431.80, 27,647.70 and 12,902.20 is: 19,353.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.80 : 27,647.70 = 12,902.20 : x
  2. Step 2: Convert to fraction form
    18,431.80/27,647.70 = 12,902.20/x
  3. Step 3: Cross multiply
    18,431.80x = 27,647.70 × 12,902.20
  4. Step 4: Simplify right side
    18,431.80x = 356,716,154.94
  5. Step 5: Solve for x
    x = 356,716,154.94/18,431.80
  6. Step 6: Final answer
    x = 19,353.30

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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.