Home / 20,628.64-28,468.12-11,197.80

Finding the Fourth Proportional to 20,628.64, 28,468.12 and 11,197.80

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Solution

The fourth proportional to 20,628.64, 28,468.12 and 11,197.80 is: 15,453.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.64 : 28,468.12 = 11,197.80 : x
  2. Step 2: Convert to fraction form
    20,628.64/28,468.12 = 11,197.80/x
  3. Step 3: Cross multiply
    20,628.64x = 28,468.12 × 11,197.80
  4. Step 4: Simplify right side
    20,628.64x = 318,780,314.14
  5. Step 5: Solve for x
    x = 318,780,314.14/20,628.64
  6. Step 6: Final answer
    x = 15,453.29

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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.