Home / 18,431.70-27,647.55-12,891.30

Finding the Fourth Proportional to 18,431.70, 27,647.55 and 12,891.30

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Solution

The fourth proportional to 18,431.70, 27,647.55 and 12,891.30 is: 19,336.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.70 : 27,647.55 = 12,891.30 : x
  2. Step 2: Convert to fraction form
    18,431.70/27,647.55 = 12,891.30/x
  3. Step 3: Cross multiply
    18,431.70x = 27,647.55 × 12,891.30
  4. Step 4: Simplify right side
    18,431.70x = 356,412,861.32
  5. Step 5: Solve for x
    x = 356,412,861.32/18,431.70
  6. Step 6: Final answer
    x = 19,336.95

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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.