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Finding the Fourth Proportional to 20,690.44, 28,552.91 and 11,259

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Solution

The fourth proportional to 20,690.44, 28,552.91 and 11,259 is: 15,537.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.44 : 28,552.91 = 11,259 : x
  2. Step 2: Convert to fraction form
    20,690.44/28,552.91 = 11,259/x
  3. Step 3: Cross multiply
    20,690.44x = 28,552.91 × 11,259
  4. Step 4: Simplify right side
    20,690.44x = 321,477,157.40
  5. Step 5: Solve for x
    x = 321,477,157.40/20,690.44
  6. Step 6: Final answer
    x = 15,537.48

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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.