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Finding the Fourth Proportional to 19,660.89, 29,491.02 and 7,180.86

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Solution

The fourth proportional to 19,660.89, 29,491.02 and 7,180.86 is: 10,771.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,660.89 : 29,491.02 = 7,180.86 : x
  2. Step 2: Convert to fraction form
    19,660.89/29,491.02 = 7,180.86/x
  3. Step 3: Cross multiply
    19,660.89x = 29,491.02 × 7,180.86
  4. Step 4: Simplify right side
    19,660.89x = 211,770,885.88
  5. Step 5: Solve for x
    x = 211,770,885.88/19,660.89
  6. Step 6: Final answer
    x = 10,771.17

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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.