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Finding the Fourth Proportional to 14,008.85, 20,991.37 and 11,920.27

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Solution

The fourth proportional to 14,008.85, 20,991.37 and 11,920.27 is: 17,861.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,008.85 : 20,991.37 = 11,920.27 : x
  2. Step 2: Convert to fraction form
    14,008.85/20,991.37 = 11,920.27/x
  3. Step 3: Cross multiply
    14,008.85x = 20,991.37 × 11,920.27
  4. Step 4: Simplify right side
    14,008.85x = 250,222,798.07
  5. Step 5: Solve for x
    x = 250,222,798.07/14,008.85
  6. Step 6: Final answer
    x = 17,861.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.