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Finding the Fourth Proportional to 13,670.53, 18,865.53 and 7,620.61

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Solution

The fourth proportional to 13,670.53, 18,865.53 and 7,620.61 is: 10,516.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.53 : 18,865.53 = 7,620.61 : x
  2. Step 2: Convert to fraction form
    13,670.53/18,865.53 = 7,620.61/x
  3. Step 3: Cross multiply
    13,670.53x = 18,865.53 × 7,620.61
  4. Step 4: Simplify right side
    13,670.53x = 143,766,846.57
  5. Step 5: Solve for x
    x = 143,766,846.57/13,670.53
  6. Step 6: Final answer
    x = 10,516.55

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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.