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Finding the Fourth Proportional to 34,351.50, 47,387.67 and 21,420.15

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Solution

The fourth proportional to 34,351.50, 47,387.67 and 21,420.15 is: 29,548.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,351.50 : 47,387.67 = 21,420.15 : x
  2. Step 2: Convert to fraction form
    34,351.50/47,387.67 = 21,420.15/x
  3. Step 3: Cross multiply
    34,351.50x = 47,387.67 × 21,420.15
  4. Step 4: Simplify right side
    34,351.50x = 1,015,050,999.55
  5. Step 5: Solve for x
    x = 1,015,050,999.55/34,351.50
  6. Step 6: Final answer
    x = 29,548.96

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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.