Home / 20,823.06-28,735.58-11,391.50

Finding the Fourth Proportional to 20,823.06, 28,735.58 and 11,391.50

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Solution

The fourth proportional to 20,823.06, 28,735.58 and 11,391.50 is: 15,720.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.06 : 28,735.58 = 11,391.50 : x
  2. Step 2: Convert to fraction form
    20,823.06/28,735.58 = 11,391.50/x
  3. Step 3: Cross multiply
    20,823.06x = 28,735.58 × 11,391.50
  4. Step 4: Simplify right side
    20,823.06x = 327,341,359.57
  5. Step 5: Solve for x
    x = 327,341,359.57/20,823.06
  6. Step 6: Final answer
    x = 15,720.14

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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.