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Finding the Fourth Proportional to 14,007.85, 20,989.87 and 11,919.27

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Solution

The fourth proportional to 14,007.85, 20,989.87 and 11,919.27 is: 17,860.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,007.85 : 20,989.87 = 11,919.27 : x
  2. Step 2: Convert to fraction form
    14,007.85/20,989.87 = 11,919.27/x
  3. Step 3: Cross multiply
    14,007.85x = 20,989.87 × 11,919.27
  4. Step 4: Simplify right side
    14,007.85x = 250,183,927.79
  5. Step 5: Solve for x
    x = 250,183,927.79/14,007.85
  6. Step 6: Final answer
    x = 17,860.27

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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.