Home / 28,861.65-39,815.41-18,786.42

Finding the Fourth Proportional to 28,861.65, 39,815.41 and 18,786.42

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Solution

The fourth proportional to 28,861.65, 39,815.41 and 18,786.42 is: 25,916.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,861.65 : 39,815.41 = 18,786.42 : x
  2. Step 2: Convert to fraction form
    28,861.65/39,815.41 = 18,786.42/x
  3. Step 3: Cross multiply
    28,861.65x = 39,815.41 × 18,786.42
  4. Step 4: Simplify right side
    28,861.65x = 747,989,014.73
  5. Step 5: Solve for x
    x = 747,989,014.73/28,861.65
  6. Step 6: Final answer
    x = 25,916.36

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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.