Home / 30,390.39-41,939.10-16,961.40

Finding the Fourth Proportional to 30,390.39, 41,939.10 and 16,961.40

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Solution

The fourth proportional to 30,390.39, 41,939.10 and 16,961.40 is: 23,406.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.39 : 41,939.10 = 16,961.40 : x
  2. Step 2: Convert to fraction form
    30,390.39/41,939.10 = 16,961.40/x
  3. Step 3: Cross multiply
    30,390.39x = 41,939.10 × 16,961.40
  4. Step 4: Simplify right side
    30,390.39x = 711,345,850.74
  5. Step 5: Solve for x
    x = 711,345,850.74/30,390.39
  6. Step 6: Final answer
    x = 23,406.93

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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.