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Finding the Fourth Proportional to 21,879.60, 32,851.80 and 16,954.80

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Solution

The fourth proportional to 21,879.60, 32,851.80 and 16,954.80 is: 25,457.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.60 : 32,851.80 = 16,954.80 : x
  2. Step 2: Convert to fraction form
    21,879.60/32,851.80 = 16,954.80/x
  3. Step 3: Cross multiply
    21,879.60x = 32,851.80 × 16,954.80
  4. Step 4: Simplify right side
    21,879.60x = 556,995,698.64
  5. Step 5: Solve for x
    x = 556,995,698.64/21,879.60
  6. Step 6: Final answer
    x = 25,457.31

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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.