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Finding the Fourth Proportional to 19,290.42, 28,928.29 and 6,808.12

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Solution

The fourth proportional to 19,290.42, 28,928.29 and 6,808.12 is: 10,209.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,290.42 : 28,928.29 = 6,808.12 : x
  2. Step 2: Convert to fraction form
    19,290.42/28,928.29 = 6,808.12/x
  3. Step 3: Cross multiply
    19,290.42x = 28,928.29 × 6,808.12
  4. Step 4: Simplify right side
    19,290.42x = 196,947,269.71
  5. Step 5: Solve for x
    x = 196,947,269.71/19,290.42
  6. Step 6: Final answer
    x = 10,209.59

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.