Home / 28,469.40-42,704.10-10,939.65

Finding the Fourth Proportional to 28,469.40, 42,704.10 and 10,939.65

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Solution

The fourth proportional to 28,469.40, 42,704.10 and 10,939.65 is: 16,409.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.40 : 42,704.10 = 10,939.65 : x
  2. Step 2: Convert to fraction form
    28,469.40/42,704.10 = 10,939.65/x
  3. Step 3: Cross multiply
    28,469.40x = 42,704.10 × 10,939.65
  4. Step 4: Simplify right side
    28,469.40x = 467,167,907.57
  5. Step 5: Solve for x
    x = 467,167,907.57/28,469.40
  6. Step 6: Final answer
    x = 16,409.48

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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.