Home / 11,751.81-16,217.37-6,446.70

Finding the Fourth Proportional to 11,751.81, 16,217.37 and 6,446.70

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Solution

The fourth proportional to 11,751.81, 16,217.37 and 6,446.70 is: 8,896.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,751.81 : 16,217.37 = 6,446.70 : x
  2. Step 2: Convert to fraction form
    11,751.81/16,217.37 = 6,446.70/x
  3. Step 3: Cross multiply
    11,751.81x = 16,217.37 × 6,446.70
  4. Step 4: Simplify right side
    11,751.81x = 104,548,519.18
  5. Step 5: Solve for x
    x = 104,548,519.18/11,751.81
  6. Step 6: Final answer
    x = 8,896.38

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Double scale
Find fourth proportional to 11,752.81, 16,218.75 and 6,447.70
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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.