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Finding the Fourth Proportional to 28,888.31, 43,339.79 and 8,111.81

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Solution

The fourth proportional to 28,888.31, 43,339.79 and 8,111.81 is: 12,169.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,888.31 : 43,339.79 = 8,111.81 : x
  2. Step 2: Convert to fraction form
    28,888.31/43,339.79 = 8,111.81/x
  3. Step 3: Cross multiply
    28,888.31x = 43,339.79 × 8,111.81
  4. Step 4: Simplify right side
    28,888.31x = 351,564,270.55
  5. Step 5: Solve for x
    x = 351,564,270.55/28,888.31
  6. Step 6: Final answer
    x = 12,169.78

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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.