Home / 18,945.90-28,419.39-7,260.03

Finding the Fourth Proportional to 18,945.90, 28,419.39 and 7,260.03

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Solution

The fourth proportional to 18,945.90, 28,419.39 and 7,260.03 is: 10,890.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,945.90 : 28,419.39 = 7,260.03 : x
  2. Step 2: Convert to fraction form
    18,945.90/28,419.39 = 7,260.03/x
  3. Step 3: Cross multiply
    18,945.90x = 28,419.39 × 7,260.03
  4. Step 4: Simplify right side
    18,945.90x = 206,325,623.98
  5. Step 5: Solve for x
    x = 206,325,623.98/18,945.90
  6. Step 6: Final answer
    x = 10,890.25

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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.