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Finding the Fourth Proportional to 20,291.94, 28,020.69 and 12,751.34

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Solution

The fourth proportional to 20,291.94, 28,020.69 and 12,751.34 is: 17,608.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.94 : 28,020.69 = 12,751.34 : x
  2. Step 2: Convert to fraction form
    20,291.94/28,020.69 = 12,751.34/x
  3. Step 3: Cross multiply
    20,291.94x = 28,020.69 × 12,751.34
  4. Step 4: Simplify right side
    20,291.94x = 357,301,205.12
  5. Step 5: Solve for x
    x = 357,301,205.12/20,291.94
  6. Step 6: Final answer
    x = 17,608.04

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.