Home / 18,949.74-28,408.40-7,271.34

Finding the Fourth Proportional to 18,949.74, 28,408.40 and 7,271.34

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Solution

The fourth proportional to 18,949.74, 28,408.40 and 7,271.34 is: 10,900.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,949.74 : 28,408.40 = 7,271.34 : x
  2. Step 2: Convert to fraction form
    18,949.74/28,408.40 = 7,271.34/x
  3. Step 3: Cross multiply
    18,949.74x = 28,408.40 × 7,271.34
  4. Step 4: Simplify right side
    18,949.74x = 206,567,135.26
  5. Step 5: Solve for x
    x = 206,567,135.26/18,949.74
  6. Step 6: Final answer
    x = 10,900.79

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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.