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Finding the Fourth Proportional to 18,341.78, 25,311.77 and 9,958.28

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Solution

The fourth proportional to 18,341.78, 25,311.77 and 9,958.28 is: 13,742.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,341.78 : 25,311.77 = 9,958.28 : x
  2. Step 2: Convert to fraction form
    18,341.78/25,311.77 = 9,958.28/x
  3. Step 3: Cross multiply
    18,341.78x = 25,311.77 × 9,958.28
  4. Step 4: Simplify right side
    18,341.78x = 252,061,516.61
  5. Step 5: Solve for x
    x = 252,061,516.61/18,341.78
  6. Step 6: Final answer
    x = 13,742.48

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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.