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Finding the Fourth Proportional to 18,907.42, 28,363.07 and 7,230.46

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Solution

The fourth proportional to 18,907.42, 28,363.07 and 7,230.46 is: 10,846.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.42 : 28,363.07 = 7,230.46 : x
  2. Step 2: Convert to fraction form
    18,907.42/28,363.07 = 7,230.46/x
  3. Step 3: Cross multiply
    18,907.42x = 28,363.07 × 7,230.46
  4. Step 4: Simplify right side
    18,907.42x = 205,078,043.11
  5. Step 5: Solve for x
    x = 205,078,043.11/18,907.42
  6. Step 6: Final answer
    x = 10,846.43

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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.