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Finding the Fourth Proportional to 18,917.41, 28,375.08 and 5,768.68

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Solution

The fourth proportional to 18,917.41, 28,375.08 and 5,768.68 is: 8,652.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.41 : 28,375.08 = 5,768.68 : x
  2. Step 2: Convert to fraction form
    18,917.41/28,375.08 = 5,768.68/x
  3. Step 3: Cross multiply
    18,917.41x = 28,375.08 × 5,768.68
  4. Step 4: Simplify right side
    18,917.41x = 163,686,756.49
  5. Step 5: Solve for x
    x = 163,686,756.49/18,917.41
  6. Step 6: Final answer
    x = 8,652.70

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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.