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Finding the Fourth Proportional to 13,907.61, 20,861.18 and 3,377.71

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Solution

The fourth proportional to 13,907.61, 20,861.18 and 3,377.71 is: 5,066.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,907.61 : 20,861.18 = 3,377.71 : x
  2. Step 2: Convert to fraction form
    13,907.61/20,861.18 = 3,377.71/x
  3. Step 3: Cross multiply
    13,907.61x = 20,861.18 × 3,377.71
  4. Step 4: Simplify right side
    13,907.61x = 70,463,068.45
  5. Step 5: Solve for x
    x = 70,463,068.45/13,907.61
  6. Step 6: Final answer
    x = 5,066.51

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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.