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Finding the Fourth Proportional to 28,433.55, 42,653.06 and 8,708.64

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Solution

The fourth proportional to 28,433.55, 42,653.06 and 8,708.64 is: 13,063.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,433.55 : 42,653.06 = 8,708.64 : x
  2. Step 2: Convert to fraction form
    28,433.55/42,653.06 = 8,708.64/x
  3. Step 3: Cross multiply
    28,433.55x = 42,653.06 × 8,708.64
  4. Step 4: Simplify right side
    28,433.55x = 371,450,144.44
  5. Step 5: Solve for x
    x = 371,450,144.44/28,433.55
  6. Step 6: Final answer
    x = 13,063.80

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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.