Home / 18,933.78-28,408.50-7,842.72

Finding the Fourth Proportional to 18,933.78, 28,408.50 and 7,842.72

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Solution

The fourth proportional to 18,933.78, 28,408.50 and 7,842.72 is: 11,767.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,933.78 : 28,408.50 = 7,842.72 : x
  2. Step 2: Convert to fraction form
    18,933.78/28,408.50 = 7,842.72/x
  3. Step 3: Cross multiply
    18,933.78x = 28,408.50 × 7,842.72
  4. Step 4: Simplify right side
    18,933.78x = 222,799,911.12
  5. Step 5: Solve for x
    x = 222,799,911.12/18,933.78
  6. Step 6: Final answer
    x = 11,767.32

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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.