Home / 20,628.72-28,467.64-11,197.28

Finding the Fourth Proportional to 20,628.72, 28,467.64 and 11,197.28

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Solution

The fourth proportional to 20,628.72, 28,467.64 and 11,197.28 is: 15,452.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.72 : 28,467.64 = 11,197.28 : x
  2. Step 2: Convert to fraction form
    20,628.72/28,467.64 = 11,197.28/x
  3. Step 3: Cross multiply
    20,628.72x = 28,467.64 × 11,197.28
  4. Step 4: Simplify right side
    20,628.72x = 318,760,136.02
  5. Step 5: Solve for x
    x = 318,760,136.02/20,628.72
  6. Step 6: Final answer
    x = 15,452.25

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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.