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Finding the Fourth Proportional to 18,919.84, 26,109.12 and 10,536.40

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Solution

The fourth proportional to 18,919.84, 26,109.12 and 10,536.40 is: 14,540.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.84 : 26,109.12 = 10,536.40 : x
  2. Step 2: Convert to fraction form
    18,919.84/26,109.12 = 10,536.40/x
  3. Step 3: Cross multiply
    18,919.84x = 26,109.12 × 10,536.40
  4. Step 4: Simplify right side
    18,919.84x = 275,096,131.97
  5. Step 5: Solve for x
    x = 275,096,131.97/18,919.84
  6. Step 6: Final answer
    x = 14,540.09

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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.