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Finding the Fourth Proportional to 18,783.75, 28,185.35 and 9,549.75

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Solution

The fourth proportional to 18,783.75, 28,185.35 and 9,549.75 is: 14,329.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.75 : 28,185.35 = 9,549.75 : x
  2. Step 2: Convert to fraction form
    18,783.75/28,185.35 = 9,549.75/x
  3. Step 3: Cross multiply
    18,783.75x = 28,185.35 × 9,549.75
  4. Step 4: Simplify right side
    18,783.75x = 269,162,998.41
  5. Step 5: Solve for x
    x = 269,162,998.41/18,783.75
  6. Step 6: Final answer
    x = 14,329.57

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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.