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Finding the Fourth Proportional to 28,885.50, 43,328.25 and 8,109

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Solution

The fourth proportional to 28,885.50, 43,328.25 and 8,109 is: 12,163.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,885.50 : 43,328.25 = 8,109 : x
  2. Step 2: Convert to fraction form
    28,885.50/43,328.25 = 8,109/x
  3. Step 3: Cross multiply
    28,885.50x = 43,328.25 × 8,109
  4. Step 4: Simplify right side
    28,885.50x = 351,348,779.25
  5. Step 5: Solve for x
    x = 351,348,779.25/28,885.50
  6. Step 6: Final answer
    x = 12,163.50

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1.5x scale

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.