Home / 21,515.90-29,711.50-16,201.50

Finding the Fourth Proportional to 21,515.90, 29,711.50 and 16,201.50

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Solution

The fourth proportional to 21,515.90, 29,711.50 and 16,201.50 is: 22,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.90 : 29,711.50 = 16,201.50 : x
  2. Step 2: Convert to fraction form
    21,515.90/29,711.50 = 16,201.50/x
  3. Step 3: Cross multiply
    21,515.90x = 29,711.50 × 16,201.50
  4. Step 4: Simplify right side
    21,515.90x = 481,370,867.25
  5. Step 5: Solve for x
    x = 481,370,867.25/21,515.90
  6. Step 6: Final answer
    x = 22,372.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.