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Finding the Fourth Proportional to 11,883.78, 17,829.62 and 3,987.07

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Solution

The fourth proportional to 11,883.78, 17,829.62 and 3,987.07 is: 5,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,883.78 : 17,829.62 = 3,987.07 : x
  2. Step 2: Convert to fraction form
    11,883.78/17,829.62 = 3,987.07/x
  3. Step 3: Cross multiply
    11,883.78x = 17,829.62 × 3,987.07
  4. Step 4: Simplify right side
    11,883.78x = 71,087,893.46
  5. Step 5: Solve for x
    x = 71,087,893.46/11,883.78
  6. Step 6: Final answer
    x = 5,981.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.