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Finding the Fourth Proportional to 28,803.74, 43,211.64 and 12,163.82

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Solution

The fourth proportional to 28,803.74, 43,211.64 and 12,163.82 is: 18,248.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,803.74 : 43,211.64 = 12,163.82 : x
  2. Step 2: Convert to fraction form
    28,803.74/43,211.64 = 12,163.82/x
  3. Step 3: Cross multiply
    28,803.74x = 43,211.64 × 12,163.82
  4. Step 4: Simplify right side
    28,803.74x = 525,618,610.86
  5. Step 5: Solve for x
    x = 525,618,610.86/28,803.74
  6. Step 6: Final answer
    x = 18,248.28

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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.