Home / 18,912.25-28,365.83-7,817.40

Finding the Fourth Proportional to 18,912.25, 28,365.83 and 7,817.40

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Solution

The fourth proportional to 18,912.25, 28,365.83 and 7,817.40 is: 11,725.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.25 : 28,365.83 = 7,817.40 : x
  2. Step 2: Convert to fraction form
    18,912.25/28,365.83 = 7,817.40/x
  3. Step 3: Cross multiply
    18,912.25x = 28,365.83 × 7,817.40
  4. Step 4: Simplify right side
    18,912.25x = 221,747,039.44
  5. Step 5: Solve for x
    x = 221,747,039.44/18,912.25
  6. Step 6: Final answer
    x = 11,725.05

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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.