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Finding the Fourth Proportional to 11,961.81, 18,055.06 and 11,961.81

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Solution

The fourth proportional to 11,961.81, 18,055.06 and 11,961.81 is: 18,055.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,961.81 : 18,055.06 = 11,961.81 : x
  2. Step 2: Convert to fraction form
    11,961.81/18,055.06 = 11,961.81/x
  3. Step 3: Cross multiply
    11,961.81x = 18,055.06 × 11,961.81
  4. Step 4: Simplify right side
    11,961.81x = 215,971,167.35
  5. Step 5: Solve for x
    x = 215,971,167.35/11,961.81
  6. Step 6: Final answer
    x = 18,055.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.