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Finding the Fourth Proportional to 21,625.50, 32,438.28 and 5,209.50

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Solution

The fourth proportional to 21,625.50, 32,438.28 and 5,209.50 is: 7,814.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,625.50 : 32,438.28 = 5,209.50 : x
  2. Step 2: Convert to fraction form
    21,625.50/32,438.28 = 5,209.50/x
  3. Step 3: Cross multiply
    21,625.50x = 32,438.28 × 5,209.50
  4. Step 4: Simplify right side
    21,625.50x = 168,987,219.66
  5. Step 5: Solve for x
    x = 168,987,219.66/21,625.50
  6. Step 6: Final answer
    x = 7,814.26

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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.