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Finding the Fourth Proportional to 27,715, 38,247.54 and 15,140.56

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Solution

The fourth proportional to 27,715, 38,247.54 and 15,140.56 is: 20,894.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,715 : 38,247.54 = 15,140.56 : x
  2. Step 2: Convert to fraction form
    27,715/38,247.54 = 15,140.56/x
  3. Step 3: Cross multiply
    27,715x = 38,247.54 × 15,140.56
  4. Step 4: Simplify right side
    27,715x = 579,089,174.22
  5. Step 5: Solve for x
    x = 579,089,174.22/27,715
  6. Step 6: Final answer
    x = 20,894.43

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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.