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Finding the Fourth Proportional to 28,515.81, 42,763.08 and 9,790.54

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Solution

The fourth proportional to 28,515.81, 42,763.08 and 9,790.54 is: 14,682.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.81 : 42,763.08 = 9,790.54 : x
  2. Step 2: Convert to fraction form
    28,515.81/42,763.08 = 9,790.54/x
  3. Step 3: Cross multiply
    28,515.81x = 42,763.08 × 9,790.54
  4. Step 4: Simplify right side
    28,515.81x = 418,673,645.26
  5. Step 5: Solve for x
    x = 418,673,645.26/28,515.81
  6. Step 6: Final answer
    x = 14,682.16

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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.