Home / 21,404.20-32,106.30-13,109.80

Finding the Fourth Proportional to 21,404.20, 32,106.30 and 13,109.80

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Solution

The fourth proportional to 21,404.20, 32,106.30 and 13,109.80 is: 19,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,404.20 : 32,106.30 = 13,109.80 : x
  2. Step 2: Convert to fraction form
    21,404.20/32,106.30 = 13,109.80/x
  3. Step 3: Cross multiply
    21,404.20x = 32,106.30 × 13,109.80
  4. Step 4: Simplify right side
    21,404.20x = 420,907,171.74
  5. Step 5: Solve for x
    x = 420,907,171.74/21,404.20
  6. Step 6: Final answer
    x = 19,664.70

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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.