Home / 20,554.20-28,364.68-11,122.68

Finding the Fourth Proportional to 20,554.20, 28,364.68 and 11,122.68

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Solution

The fourth proportional to 20,554.20, 28,364.68 and 11,122.68 is: 15,349.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.20 : 28,364.68 = 11,122.68 : x
  2. Step 2: Convert to fraction form
    20,554.20/28,364.68 = 11,122.68/x
  3. Step 3: Cross multiply
    20,554.20x = 28,364.68 × 11,122.68
  4. Step 4: Simplify right side
    20,554.20x = 315,491,258.94
  5. Step 5: Solve for x
    x = 315,491,258.94/20,554.20
  6. Step 6: Final answer
    x = 15,349.24

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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.