Home / 28,405.80-39,198.43-15,658.96

Finding the Fourth Proportional to 28,405.80, 39,198.43 and 15,658.96

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Solution

The fourth proportional to 28,405.80, 39,198.43 and 15,658.96 is: 21,608.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.80 : 39,198.43 = 15,658.96 : x
  2. Step 2: Convert to fraction form
    28,405.80/39,198.43 = 15,658.96/x
  3. Step 3: Cross multiply
    28,405.80x = 39,198.43 × 15,658.96
  4. Step 4: Simplify right side
    28,405.80x = 613,806,748.65
  5. Step 5: Solve for x
    x = 613,806,748.65/28,405.80
  6. Step 6: Final answer
    x = 21,608.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.