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Finding the Fourth Proportional to 18,845.79, 28,268.70 and 8,313.58

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Solution

The fourth proportional to 18,845.79, 28,268.70 and 8,313.58 is: 12,470.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,845.79 : 28,268.70 = 8,313.58 : x
  2. Step 2: Convert to fraction form
    18,845.79/28,268.70 = 8,313.58/x
  3. Step 3: Cross multiply
    18,845.79x = 28,268.70 × 8,313.58
  4. Step 4: Simplify right side
    18,845.79x = 235,014,098.95
  5. Step 5: Solve for x
    x = 235,014,098.95/18,845.79
  6. Step 6: Final answer
    x = 12,470.38

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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.