Home / 28,518.88-39,356.32-15,771.41

Finding the Fourth Proportional to 28,518.88, 39,356.32 and 15,771.41

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Solution

The fourth proportional to 28,518.88, 39,356.32 and 15,771.41 is: 21,764.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.88 : 39,356.32 = 15,771.41 : x
  2. Step 2: Convert to fraction form
    28,518.88/39,356.32 = 15,771.41/x
  3. Step 3: Cross multiply
    28,518.88x = 39,356.32 × 15,771.41
  4. Step 4: Simplify right side
    28,518.88x = 620,704,383.17
  5. Step 5: Solve for x
    x = 620,704,383.17/28,518.88
  6. Step 6: Final answer
    x = 21,764.68

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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.