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Finding the Fourth Proportional to 18,758.25, 28,137.65 and 4,907.25

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Solution

The fourth proportional to 18,758.25, 28,137.65 and 4,907.25 is: 7,360.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.25 : 28,137.65 = 4,907.25 : x
  2. Step 2: Convert to fraction form
    18,758.25/28,137.65 = 4,907.25/x
  3. Step 3: Cross multiply
    18,758.25x = 28,137.65 × 4,907.25
  4. Step 4: Simplify right side
    18,758.25x = 138,078,458.43
  5. Step 5: Solve for x
    x = 138,078,458.43/18,758.25
  6. Step 6: Final answer
    x = 7,360.95

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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.