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Finding the Fourth Proportional to 28,784.81, 43,183.03 and 12,144.88

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Solution

The fourth proportional to 28,784.81, 43,183.03 and 12,144.88 is: 18,219.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,784.81 : 43,183.03 = 12,144.88 : x
  2. Step 2: Convert to fraction form
    28,784.81/43,183.03 = 12,144.88/x
  3. Step 3: Cross multiply
    28,784.81x = 43,183.03 × 12,144.88
  4. Step 4: Simplify right side
    28,784.81x = 524,452,579.07
  5. Step 5: Solve for x
    x = 524,452,579.07/28,784.81
  6. Step 6: Final answer
    x = 18,219.77

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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.