Home / 18,938.45-26,137.31-11,388.65

Finding the Fourth Proportional to 18,938.45, 26,137.31 and 11,388.65

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Solution

The fourth proportional to 18,938.45, 26,137.31 and 11,388.65 is: 15,717.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938.45 : 26,137.31 = 11,388.65 : x
  2. Step 2: Convert to fraction form
    18,938.45/26,137.31 = 11,388.65/x
  3. Step 3: Cross multiply
    18,938.45x = 26,137.31 × 11,388.65
  4. Step 4: Simplify right side
    18,938.45x = 297,668,487.90
  5. Step 5: Solve for x
    x = 297,668,487.90/18,938.45
  6. Step 6: Final answer
    x = 15,717.68

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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.