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Finding the Fourth Proportional to 30,250.71, 41,745.78 and 16,821.86

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Solution

The fourth proportional to 30,250.71, 41,745.78 and 16,821.86 is: 23,214.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,250.71 : 41,745.78 = 16,821.86 : x
  2. Step 2: Convert to fraction form
    30,250.71/41,745.78 = 16,821.86/x
  3. Step 3: Cross multiply
    30,250.71x = 41,745.78 × 16,821.86
  4. Step 4: Simplify right side
    30,250.71x = 702,241,458.02
  5. Step 5: Solve for x
    x = 702,241,458.02/30,250.71
  6. Step 6: Final answer
    x = 23,214.05

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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.