Home / 28,974.40-43,429.20-12,331.60

Finding the Fourth Proportional to 28,974.40, 43,429.20 and 12,331.60

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Solution

The fourth proportional to 28,974.40, 43,429.20 and 12,331.60 is: 18,483.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,974.40 : 43,429.20 = 12,331.60 : x
  2. Step 2: Convert to fraction form
    28,974.40/43,429.20 = 12,331.60/x
  3. Step 3: Cross multiply
    28,974.40x = 43,429.20 × 12,331.60
  4. Step 4: Simplify right side
    28,974.40x = 535,551,522.72
  5. Step 5: Solve for x
    x = 535,551,522.72/28,974.40
  6. Step 6: Final answer
    x = 18,483.61

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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.