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Finding the Fourth Proportional to 15,003.66, 20,700.84 and 8,629.92

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Solution

The fourth proportional to 15,003.66, 20,700.84 and 8,629.92 is: 11,906.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,003.66 : 20,700.84 = 8,629.92 : x
  2. Step 2: Convert to fraction form
    15,003.66/20,700.84 = 8,629.92/x
  3. Step 3: Cross multiply
    15,003.66x = 20,700.84 × 8,629.92
  4. Step 4: Simplify right side
    15,003.66x = 178,646,593.13
  5. Step 5: Solve for x
    x = 178,646,593.13/15,003.66
  6. Step 6: Final answer
    x = 11,906.87

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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.