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Finding the Fourth Proportional to 18,917.80, 26,105.86 and 10,534.12

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Solution

The fourth proportional to 18,917.80, 26,105.86 and 10,534.12 is: 14,536.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.80 : 26,105.86 = 10,534.12 : x
  2. Step 2: Convert to fraction form
    18,917.80/26,105.86 = 10,534.12/x
  3. Step 3: Cross multiply
    18,917.80x = 26,105.86 × 10,534.12
  4. Step 4: Simplify right side
    18,917.80x = 275,002,261.94
  5. Step 5: Solve for x
    x = 275,002,261.94/18,917.80
  6. Step 6: Final answer
    x = 14,536.69

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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.