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Finding the Fourth Proportional to 34,381.80, 51,605.10 and 21,259.80

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Solution

The fourth proportional to 34,381.80, 51,605.10 and 21,259.80 is: 31,909.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,381.80 : 51,605.10 = 21,259.80 : x
  2. Step 2: Convert to fraction form
    34,381.80/51,605.10 = 21,259.80/x
  3. Step 3: Cross multiply
    34,381.80x = 51,605.10 × 21,259.80
  4. Step 4: Simplify right side
    34,381.80x = 1,097,114,104.98
  5. Step 5: Solve for x
    x = 1,097,114,104.98/34,381.80
  6. Step 6: Final answer
    x = 31,909.73

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Why These Related Problems?

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