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Finding the Fourth Proportional to 14,028.80, 21,043.20 and 8,182.40

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Solution

The fourth proportional to 14,028.80, 21,043.20 and 8,182.40 is: 12,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,028.80 : 21,043.20 = 8,182.40 : x
  2. Step 2: Convert to fraction form
    14,028.80/21,043.20 = 8,182.40/x
  3. Step 3: Cross multiply
    14,028.80x = 21,043.20 × 8,182.40
  4. Step 4: Simplify right side
    14,028.80x = 172,183,879.68
  5. Step 5: Solve for x
    x = 172,183,879.68/14,028.80
  6. Step 6: Final answer
    x = 12,273.60

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1.5x scale

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.