Home / 27,651.78-38,129.31-18,683.69

Finding the Fourth Proportional to 27,651.78, 38,129.31 and 18,683.69

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Solution

The fourth proportional to 27,651.78, 38,129.31 and 18,683.69 is: 25,763.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,651.78 : 38,129.31 = 18,683.69 : x
  2. Step 2: Convert to fraction form
    27,651.78/38,129.31 = 18,683.69/x
  3. Step 3: Cross multiply
    27,651.78x = 38,129.31 × 18,683.69
  4. Step 4: Simplify right side
    27,651.78x = 712,396,017.31
  5. Step 5: Solve for x
    x = 712,396,017.31/27,651.78
  6. Step 6: Final answer
    x = 25,763.12

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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.