Home / 28,861.42-39,829.38-15,940.65

Finding the Fourth Proportional to 28,861.42, 39,829.38 and 15,940.65

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Solution

The fourth proportional to 28,861.42, 39,829.38 and 15,940.65 is: 21,998.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,861.42 : 39,829.38 = 15,940.65 : x
  2. Step 2: Convert to fraction form
    28,861.42/39,829.38 = 15,940.65/x
  3. Step 3: Cross multiply
    28,861.42x = 39,829.38 × 15,940.65
  4. Step 4: Simplify right side
    28,861.42x = 634,906,206.30
  5. Step 5: Solve for x
    x = 634,906,206.30/28,861.42
  6. Step 6: Final answer
    x = 21,998.44

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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.