Home / 28,736.56-39,644.40-18,668.80

Finding the Fourth Proportional to 28,736.56, 39,644.40 and 18,668.80

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Solution

The fourth proportional to 28,736.56, 39,644.40 and 18,668.80 is: 25,755.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,736.56 : 39,644.40 = 18,668.80 : x
  2. Step 2: Convert to fraction form
    28,736.56/39,644.40 = 18,668.80/x
  3. Step 3: Cross multiply
    28,736.56x = 39,644.40 × 18,668.80
  4. Step 4: Simplify right side
    28,736.56x = 740,113,374.72
  5. Step 5: Solve for x
    x = 740,113,374.72/28,736.56
  6. Step 6: Final answer
    x = 25,755.11

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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.