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Finding the Fourth Proportional to 18,919.50, 26,109.09 and 10,536.18

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Solution

The fourth proportional to 18,919.50, 26,109.09 and 10,536.18 is: 14,540.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.50 : 26,109.09 = 10,536.18 : x
  2. Step 2: Convert to fraction form
    18,919.50/26,109.09 = 10,536.18/x
  3. Step 3: Cross multiply
    18,919.50x = 26,109.09 × 10,536.18
  4. Step 4: Simplify right side
    18,919.50x = 275,090,071.88
  5. Step 5: Solve for x
    x = 275,090,071.88/18,919.50
  6. Step 6: Final answer
    x = 14,540.03

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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.