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Finding the Fourth Proportional to 14,939.01, 20,614.64 and 8,651.79

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Solution

The fourth proportional to 14,939.01, 20,614.64 and 8,651.79 is: 11,938.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,939.01 : 20,614.64 = 8,651.79 : x
  2. Step 2: Convert to fraction form
    14,939.01/20,614.64 = 8,651.79/x
  3. Step 3: Cross multiply
    14,939.01x = 20,614.64 × 8,651.79
  4. Step 4: Simplify right side
    14,939.01x = 178,353,492.95
  5. Step 5: Solve for x
    x = 178,353,492.95/14,939.01
  6. Step 6: Final answer
    x = 11,938.78

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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.