Home / 28,912.60-43,385.10-12,269.80

Finding the Fourth Proportional to 28,912.60, 43,385.10 and 12,269.80

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Solution

The fourth proportional to 28,912.60, 43,385.10 and 12,269.80 is: 18,411.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.60 : 43,385.10 = 12,269.80 : x
  2. Step 2: Convert to fraction form
    28,912.60/43,385.10 = 12,269.80/x
  3. Step 3: Cross multiply
    28,912.60x = 43,385.10 × 12,269.80
  4. Step 4: Simplify right side
    28,912.60x = 532,326,499.98
  5. Step 5: Solve for x
    x = 532,326,499.98/28,912.60
  6. Step 6: Final answer
    x = 18,411.57

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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.