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Finding the Fourth Proportional to 15,213.87, 20,994.48 and 9,551.55

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Solution

The fourth proportional to 15,213.87, 20,994.48 and 9,551.55 is: 13,180.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213.87 : 20,994.48 = 9,551.55 : x
  2. Step 2: Convert to fraction form
    15,213.87/20,994.48 = 9,551.55/x
  3. Step 3: Cross multiply
    15,213.87x = 20,994.48 × 9,551.55
  4. Step 4: Simplify right side
    15,213.87x = 200,529,825.44
  5. Step 5: Solve for x
    x = 200,529,825.44/15,213.87
  6. Step 6: Final answer
    x = 13,180.72

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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.