Home / 18,791.12-28,185.69-6,311.40

Finding the Fourth Proportional to 18,791.12, 28,185.69 and 6,311.40

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Solution

The fourth proportional to 18,791.12, 28,185.69 and 6,311.40 is: 9,466.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.12 : 28,185.69 = 6,311.40 : x
  2. Step 2: Convert to fraction form
    18,791.12/28,185.69 = 6,311.40/x
  3. Step 3: Cross multiply
    18,791.12x = 28,185.69 × 6,311.40
  4. Step 4: Simplify right side
    18,791.12x = 177,891,240.38
  5. Step 5: Solve for x
    x = 177,891,240.38/18,791.12
  6. Step 6: Final answer
    x = 9,466.77

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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.