Home / 20,992-28,968.96-11,560.56

Finding the Fourth Proportional to 20,992, 28,968.96 and 11,560.56

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Solution

The fourth proportional to 20,992, 28,968.96 and 11,560.56 is: 15,953.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992 : 28,968.96 = 11,560.56 : x
  2. Step 2: Convert to fraction form
    20,992/28,968.96 = 11,560.56/x
  3. Step 3: Cross multiply
    20,992x = 28,968.96 × 11,560.56
  4. Step 4: Simplify right side
    20,992x = 334,897,400.22
  5. Step 5: Solve for x
    x = 334,897,400.22/20,992
  6. Step 6: Final answer
    x = 15,953.57

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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.