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Finding the Fourth Proportional to 11,945.50, 16,480.93 and 6,639.29

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Solution

The fourth proportional to 11,945.50, 16,480.93 and 6,639.29 is: 9,160.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.50 : 16,480.93 = 6,639.29 : x
  2. Step 2: Convert to fraction form
    11,945.50/16,480.93 = 6,639.29/x
  3. Step 3: Cross multiply
    11,945.50x = 16,480.93 × 6,639.29
  4. Step 4: Simplify right side
    11,945.50x = 109,421,636.54
  5. Step 5: Solve for x
    x = 109,421,636.54/11,945.50
  6. Step 6: Final answer
    x = 9,160.07

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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.