Home / 28,914.87-39,902.80-16,978.41

Finding the Fourth Proportional to 28,914.87, 39,902.80 and 16,978.41

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Solution

The fourth proportional to 28,914.87, 39,902.80 and 16,978.41 is: 23,430.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,914.87 : 39,902.80 = 16,978.41 : x
  2. Step 2: Convert to fraction form
    28,914.87/39,902.80 = 16,978.41/x
  3. Step 3: Cross multiply
    28,914.87x = 39,902.80 × 16,978.41
  4. Step 4: Simplify right side
    28,914.87x = 677,486,135.69
  5. Step 5: Solve for x
    x = 677,486,135.69/28,914.87
  6. Step 6: Final answer
    x = 23,430.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.