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Finding the Fourth Proportional to 15,074.80, 20,820.25 and 10,286.54

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Solution

The fourth proportional to 15,074.80, 20,820.25 and 10,286.54 is: 14,207.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,074.80 : 20,820.25 = 10,286.54 : x
  2. Step 2: Convert to fraction form
    15,074.80/20,820.25 = 10,286.54/x
  3. Step 3: Cross multiply
    15,074.80x = 20,820.25 × 10,286.54
  4. Step 4: Simplify right side
    15,074.80x = 214,168,334.44
  5. Step 5: Solve for x
    x = 214,168,334.44/15,074.80
  6. Step 6: Final answer
    x = 14,207.04

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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.