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Finding the Fourth Proportional to 30,329.91, 41,811.86 and 21,349.51

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Solution

The fourth proportional to 30,329.91, 41,811.86 and 21,349.51 is: 29,431.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,329.91 : 41,811.86 = 21,349.51 : x
  2. Step 2: Convert to fraction form
    30,329.91/41,811.86 = 21,349.51/x
  3. Step 3: Cross multiply
    30,329.91x = 41,811.86 × 21,349.51
  4. Step 4: Simplify right side
    30,329.91x = 892,662,672.03
  5. Step 5: Solve for x
    x = 892,662,672.03/30,329.91
  6. Step 6: Final answer
    x = 29,431.76

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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.