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Finding the Fourth Proportional to 21,666.08, 29,898.96 and 12,234.08

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Solution

The fourth proportional to 21,666.08, 29,898.96 and 12,234.08 is: 16,882.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.08 : 29,898.96 = 12,234.08 : x
  2. Step 2: Convert to fraction form
    21,666.08/29,898.96 = 12,234.08/x
  3. Step 3: Cross multiply
    21,666.08x = 29,898.96 × 12,234.08
  4. Step 4: Simplify right side
    21,666.08x = 365,786,268.56
  5. Step 5: Solve for x
    x = 365,786,268.56/21,666.08
  6. Step 6: Final answer
    x = 16,882.90

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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.