Home / 18,891.75-28,338.80-5,745.09

Finding the Fourth Proportional to 18,891.75, 28,338.80 and 5,745.09

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Solution

The fourth proportional to 18,891.75, 28,338.80 and 5,745.09 is: 8,617.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.75 : 28,338.80 = 5,745.09 : x
  2. Step 2: Convert to fraction form
    18,891.75/28,338.80 = 5,745.09/x
  3. Step 3: Cross multiply
    18,891.75x = 28,338.80 × 5,745.09
  4. Step 4: Simplify right side
    18,891.75x = 162,808,927.77
  5. Step 5: Solve for x
    x = 162,808,927.77/18,891.75
  6. Step 6: Final answer
    x = 8,617.99

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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.