Home / 18,515.18-27,765.30-6,825.80

Finding the Fourth Proportional to 18,515.18, 27,765.30 and 6,825.80

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Solution

The fourth proportional to 18,515.18, 27,765.30 and 6,825.80 is: 10,235.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.18 : 27,765.30 = 6,825.80 : x
  2. Step 2: Convert to fraction form
    18,515.18/27,765.30 = 6,825.80/x
  3. Step 3: Cross multiply
    18,515.18x = 27,765.30 × 6,825.80
  4. Step 4: Simplify right side
    18,515.18x = 189,520,384.74
  5. Step 5: Solve for x
    x = 189,520,384.74/18,515.18
  6. Step 6: Final answer
    x = 10,235.95

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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.