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Finding the Fourth Proportional to 18,906.36, 26,090.30 and 10,408.40

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Solution

The fourth proportional to 18,906.36, 26,090.30 and 10,408.40 is: 14,363.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.36 : 26,090.30 = 10,408.40 : x
  2. Step 2: Convert to fraction form
    18,906.36/26,090.30 = 10,408.40/x
  3. Step 3: Cross multiply
    18,906.36x = 26,090.30 × 10,408.40
  4. Step 4: Simplify right side
    18,906.36x = 271,558,271.93
  5. Step 5: Solve for x
    x = 271,558,271.93/18,906.36
  6. Step 6: Final answer
    x = 14,363.33

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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.