Home / 28,912.20-43,368.30-8,135.70

Finding the Fourth Proportional to 28,912.20, 43,368.30 and 8,135.70

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Solution

The fourth proportional to 28,912.20, 43,368.30 and 8,135.70 is: 12,203.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.20 : 43,368.30 = 8,135.70 : x
  2. Step 2: Convert to fraction form
    28,912.20/43,368.30 = 8,135.70/x
  3. Step 3: Cross multiply
    28,912.20x = 43,368.30 × 8,135.70
  4. Step 4: Simplify right side
    28,912.20x = 352,831,478.31
  5. Step 5: Solve for x
    x = 352,831,478.31/28,912.20
  6. Step 6: Final answer
    x = 12,203.55

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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.