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Finding the Fourth Proportional to 11,861, 16,371.30 and 6,825.80

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Solution

The fourth proportional to 11,861, 16,371.30 and 6,825.80 is: 9,421.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,861 : 16,371.30 = 6,825.80 : x
  2. Step 2: Convert to fraction form
    11,861/16,371.30 = 6,825.80/x
  3. Step 3: Cross multiply
    11,861x = 16,371.30 × 6,825.80
  4. Step 4: Simplify right side
    11,861x = 111,747,219.54
  5. Step 5: Solve for x
    x = 111,747,219.54/11,861
  6. Step 6: Final answer
    x = 9,421.40

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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.