Home / 20,484.48-28,249.92-13,408.32

Finding the Fourth Proportional to 20,484.48, 28,249.92 and 13,408.32

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Solution

The fourth proportional to 20,484.48, 28,249.92 and 13,408.32 is: 18,491.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,484.48 : 28,249.92 = 13,408.32 : x
  2. Step 2: Convert to fraction form
    20,484.48/28,249.92 = 13,408.32/x
  3. Step 3: Cross multiply
    20,484.48x = 28,249.92 × 13,408.32
  4. Step 4: Simplify right side
    20,484.48x = 378,783,967.33
  5. Step 5: Solve for x
    x = 378,783,967.33/20,484.48
  6. Step 6: Final answer
    x = 18,491.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.