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Finding the Fourth Proportional to 43,919.74, 65,879.78 and 10,639.76

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Solution

The fourth proportional to 43,919.74, 65,879.78 and 10,639.76 is: 15,959.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,919.74 : 65,879.78 = 10,639.76 : x
  2. Step 2: Convert to fraction form
    43,919.74/65,879.78 = 10,639.76/x
  3. Step 3: Cross multiply
    43,919.74x = 65,879.78 × 10,639.76
  4. Step 4: Simplify right side
    43,919.74x = 700,945,048.05
  5. Step 5: Solve for x
    x = 700,945,048.05/43,919.74
  6. Step 6: Final answer
    x = 15,959.68

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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.