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Finding the Fourth Proportional to 18,025.64, 24,868.11 and 11,978.79

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Solution

The fourth proportional to 18,025.64, 24,868.11 and 11,978.79 is: 16,525.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,025.64 : 24,868.11 = 11,978.79 : x
  2. Step 2: Convert to fraction form
    18,025.64/24,868.11 = 11,978.79/x
  3. Step 3: Cross multiply
    18,025.64x = 24,868.11 × 11,978.79
  4. Step 4: Simplify right side
    18,025.64x = 297,889,819.05
  5. Step 5: Solve for x
    x = 297,889,819.05/18,025.64
  6. Step 6: Final answer
    x = 16,525.90

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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.