Home / 29,815.65-41,128.45-18,618.21

Finding the Fourth Proportional to 29,815.65, 41,128.45 and 18,618.21

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Solution

The fourth proportional to 29,815.65, 41,128.45 and 18,618.21 is: 25,682.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,815.65 : 41,128.45 = 18,618.21 : x
  2. Step 2: Convert to fraction form
    29,815.65/41,128.45 = 18,618.21/x
  3. Step 3: Cross multiply
    29,815.65x = 41,128.45 × 18,618.21
  4. Step 4: Simplify right side
    29,815.65x = 765,738,119.07
  5. Step 5: Solve for x
    x = 765,738,119.07/29,815.65
  6. Step 6: Final answer
    x = 25,682.42

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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.