Home / 18,620.40-27,935.55-8,085.90

Finding the Fourth Proportional to 18,620.40, 27,935.55 and 8,085.90

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Solution

The fourth proportional to 18,620.40, 27,935.55 and 8,085.90 is: 12,131.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.40 : 27,935.55 = 8,085.90 : x
  2. Step 2: Convert to fraction form
    18,620.40/27,935.55 = 8,085.90/x
  3. Step 3: Cross multiply
    18,620.40x = 27,935.55 × 8,085.90
  4. Step 4: Simplify right side
    18,620.40x = 225,884,063.75
  5. Step 5: Solve for x
    x = 225,884,063.75/18,620.40
  6. Step 6: Final answer
    x = 12,131.00

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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.