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Finding the Fourth Proportional to 18,907.25, 28,354.25 and 5,576.70

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Solution

The fourth proportional to 18,907.25, 28,354.25 and 5,576.70 is: 8,363.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.25 : 28,354.25 = 5,576.70 : x
  2. Step 2: Convert to fraction form
    18,907.25/28,354.25 = 5,576.70/x
  3. Step 3: Cross multiply
    18,907.25x = 28,354.25 × 5,576.70
  4. Step 4: Simplify right side
    18,907.25x = 158,123,145.98
  5. Step 5: Solve for x
    x = 158,123,145.98/18,907.25
  6. Step 6: Final answer
    x = 8,363.10

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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.