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Finding the Fourth Proportional to 18,838.44, 28,259.76 and 8,303.94

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Solution

The fourth proportional to 18,838.44, 28,259.76 and 8,303.94 is: 12,456.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.44 : 28,259.76 = 8,303.94 : x
  2. Step 2: Convert to fraction form
    18,838.44/28,259.76 = 8,303.94/x
  3. Step 3: Cross multiply
    18,838.44x = 28,259.76 × 8,303.94
  4. Step 4: Simplify right side
    18,838.44x = 234,667,351.45
  5. Step 5: Solve for x
    x = 234,667,351.45/18,838.44
  6. Step 6: Final answer
    x = 12,456.84

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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.