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Finding the Fourth Proportional to 29,289.81, 40,420.05 and 15,861.03

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Solution

The fourth proportional to 29,289.81, 40,420.05 and 15,861.03 is: 21,888.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,289.81 : 40,420.05 = 15,861.03 : x
  2. Step 2: Convert to fraction form
    29,289.81/40,420.05 = 15,861.03/x
  3. Step 3: Cross multiply
    29,289.81x = 40,420.05 × 15,861.03
  4. Step 4: Simplify right side
    29,289.81x = 641,103,414.60
  5. Step 5: Solve for x
    x = 641,103,414.60/29,289.81
  6. Step 6: Final answer
    x = 21,888.27

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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.