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Finding the Fourth Proportional to 13,339.66, 20,010.50 and 3,978.94

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Solution

The fourth proportional to 13,339.66, 20,010.50 and 3,978.94 is: 5,968.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.66 : 20,010.50 = 3,978.94 : x
  2. Step 2: Convert to fraction form
    13,339.66/20,010.50 = 3,978.94/x
  3. Step 3: Cross multiply
    13,339.66x = 20,010.50 × 3,978.94
  4. Step 4: Simplify right side
    13,339.66x = 79,620,578.87
  5. Step 5: Solve for x
    x = 79,620,578.87/13,339.66
  6. Step 6: Final answer
    x = 5,968.71

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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.