Home / 20,708.72-28,578.08-11,277.89

Finding the Fourth Proportional to 20,708.72, 28,578.08 and 11,277.89

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Solution

The fourth proportional to 20,708.72, 28,578.08 and 11,277.89 is: 15,563.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.72 : 28,578.08 = 11,277.89 : x
  2. Step 2: Convert to fraction form
    20,708.72/28,578.08 = 11,277.89/x
  3. Step 3: Cross multiply
    20,708.72x = 28,578.08 × 11,277.89
  4. Step 4: Simplify right side
    20,708.72x = 322,300,442.65
  5. Step 5: Solve for x
    x = 322,300,442.65/20,708.72
  6. Step 6: Final answer
    x = 15,563.51

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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.