Home / 28,938.70-43,408.05-17,857.90

Finding the Fourth Proportional to 28,938.70, 43,408.05 and 17,857.90

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Solution

The fourth proportional to 28,938.70, 43,408.05 and 17,857.90 is: 26,786.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,938.70 : 43,408.05 = 17,857.90 : x
  2. Step 2: Convert to fraction form
    28,938.70/43,408.05 = 17,857.90/x
  3. Step 3: Cross multiply
    28,938.70x = 43,408.05 × 17,857.90
  4. Step 4: Simplify right side
    28,938.70x = 775,176,616.10
  5. Step 5: Solve for x
    x = 775,176,616.10/28,938.70
  6. Step 6: Final answer
    x = 26,786.85

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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.