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Finding the Fourth Proportional to 14,662.78, 20,235.34 and 8,289.64

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Solution

The fourth proportional to 14,662.78, 20,235.34 and 8,289.64 is: 11,440.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,662.78 : 20,235.34 = 8,289.64 : x
  2. Step 2: Convert to fraction form
    14,662.78/20,235.34 = 8,289.64/x
  3. Step 3: Cross multiply
    14,662.78x = 20,235.34 × 8,289.64
  4. Step 4: Simplify right side
    14,662.78x = 167,743,683.88
  5. Step 5: Solve for x
    x = 167,743,683.88/14,662.78
  6. Step 6: Final answer
    x = 11,440.10

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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.