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Finding the Fourth Proportional to 40,680.86, 61,030.49 and 21,960.49

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Solution

The fourth proportional to 40,680.86, 61,030.49 and 21,960.49 is: 32,945.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,680.86 : 61,030.49 = 21,960.49 : x
  2. Step 2: Convert to fraction form
    40,680.86/61,030.49 = 21,960.49/x
  3. Step 3: Cross multiply
    40,680.86x = 61,030.49 × 21,960.49
  4. Step 4: Simplify right side
    40,680.86x = 1,340,259,550.81
  5. Step 5: Solve for x
    x = 1,340,259,550.81/40,680.86
  6. Step 6: Final answer
    x = 32,945.71

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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.