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Finding the Fourth Proportional to 18,857.44, 28,289.80 and 7,169.75

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Solution

The fourth proportional to 18,857.44, 28,289.80 and 7,169.75 is: 10,756.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,857.44 : 28,289.80 = 7,169.75 : x
  2. Step 2: Convert to fraction form
    18,857.44/28,289.80 = 7,169.75/x
  3. Step 3: Cross multiply
    18,857.44x = 28,289.80 × 7,169.75
  4. Step 4: Simplify right side
    18,857.44x = 202,830,713.86
  5. Step 5: Solve for x
    x = 202,830,713.86/18,857.44
  6. Step 6: Final answer
    x = 10,756.01

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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.