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Finding the Fourth Proportional to 18,817.99, 28,223.38 and 9,455.41

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Solution

The fourth proportional to 18,817.99, 28,223.38 and 9,455.41 is: 14,181.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.99 : 28,223.38 = 9,455.41 : x
  2. Step 2: Convert to fraction form
    18,817.99/28,223.38 = 9,455.41/x
  3. Step 3: Cross multiply
    18,817.99x = 28,223.38 × 9,455.41
  4. Step 4: Simplify right side
    18,817.99x = 266,863,582.21
  5. Step 5: Solve for x
    x = 266,863,582.21/18,817.99
  6. Step 6: Final answer
    x = 14,181.30

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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.