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Finding the Fourth Proportional to 18,823.26, 28,223.82 and 7,137.30

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Solution

The fourth proportional to 18,823.26, 28,223.82 and 7,137.30 is: 10,701.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,823.26 : 28,223.82 = 7,137.30 : x
  2. Step 2: Convert to fraction form
    18,823.26/28,223.82 = 7,137.30/x
  3. Step 3: Cross multiply
    18,823.26x = 28,223.82 × 7,137.30
  4. Step 4: Simplify right side
    18,823.26x = 201,441,870.49
  5. Step 5: Solve for x
    x = 201,441,870.49/18,823.26
  6. Step 6: Final answer
    x = 10,701.75

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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.