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Finding the Fourth Proportional to 15,059.64, 20,782.85 and 9,090.15

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Solution

The fourth proportional to 15,059.64, 20,782.85 and 9,090.15 is: 12,544.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.64 : 20,782.85 = 9,090.15 : x
  2. Step 2: Convert to fraction form
    15,059.64/20,782.85 = 9,090.15/x
  3. Step 3: Cross multiply
    15,059.64x = 20,782.85 × 9,090.15
  4. Step 4: Simplify right side
    15,059.64x = 188,919,074.56
  5. Step 5: Solve for x
    x = 188,919,074.56/15,059.64
  6. Step 6: Final answer
    x = 12,544.73

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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.