Home / 28,910.78-43,370.40-12,270.80

Finding the Fourth Proportional to 28,910.78, 43,370.40 and 12,270.80

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Solution

The fourth proportional to 28,910.78, 43,370.40 and 12,270.80 is: 18,408.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,910.78 : 43,370.40 = 12,270.80 : x
  2. Step 2: Convert to fraction form
    28,910.78/43,370.40 = 12,270.80/x
  3. Step 3: Cross multiply
    28,910.78x = 43,370.40 × 12,270.80
  4. Step 4: Simplify right side
    28,910.78x = 532,189,504.32
  5. Step 5: Solve for x
    x = 532,189,504.32/28,910.78
  6. Step 6: Final answer
    x = 18,408.00

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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.