Home / 27,991.65-38,636.42-18,438.51

Finding the Fourth Proportional to 27,991.65, 38,636.42 and 18,438.51

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Solution

The fourth proportional to 27,991.65, 38,636.42 and 18,438.51 is: 25,450.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.65 : 38,636.42 = 18,438.51 : x
  2. Step 2: Convert to fraction form
    27,991.65/38,636.42 = 18,438.51/x
  3. Step 3: Cross multiply
    27,991.65x = 38,636.42 × 18,438.51
  4. Step 4: Simplify right side
    27,991.65x = 712,397,924.34
  5. Step 5: Solve for x
    x = 712,397,924.34/27,991.65
  6. Step 6: Final answer
    x = 25,450.37

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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.