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Finding the Fourth Proportional to 18,907.86, 28,379.31 and 9,554.46

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Solution

The fourth proportional to 18,907.86, 28,379.31 and 9,554.46 is: 14,340.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.86 : 28,379.31 = 9,554.46 : x
  2. Step 2: Convert to fraction form
    18,907.86/28,379.31 = 9,554.46/x
  3. Step 3: Cross multiply
    18,907.86x = 28,379.31 × 9,554.46
  4. Step 4: Simplify right side
    18,907.86x = 271,148,982.22
  5. Step 5: Solve for x
    x = 271,148,982.22/18,907.86
  6. Step 6: Final answer
    x = 14,340.54

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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.