Home / 20,647.21-28,493.01-11,215.69

Finding the Fourth Proportional to 20,647.21, 28,493.01 and 11,215.69

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Solution

The fourth proportional to 20,647.21, 28,493.01 and 11,215.69 is: 15,477.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.21 : 28,493.01 = 11,215.69 : x
  2. Step 2: Convert to fraction form
    20,647.21/28,493.01 = 11,215.69/x
  3. Step 3: Cross multiply
    20,647.21x = 28,493.01 × 11,215.69
  4. Step 4: Simplify right side
    20,647.21x = 319,568,767.33
  5. Step 5: Solve for x
    x = 319,568,767.33/20,647.21
  6. Step 6: Final answer
    x = 15,477.58

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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.