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Finding the Fourth Proportional to 18,643.51, 27,956.43 and 6,788.89

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Solution

The fourth proportional to 18,643.51, 27,956.43 and 6,788.89 is: 10,180.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.51 : 27,956.43 = 6,788.89 : x
  2. Step 2: Convert to fraction form
    18,643.51/27,956.43 = 6,788.89/x
  3. Step 3: Cross multiply
    18,643.51x = 27,956.43 × 6,788.89
  4. Step 4: Simplify right side
    18,643.51x = 189,793,128.06
  5. Step 5: Solve for x
    x = 189,793,128.06/18,643.51
  6. Step 6: Final answer
    x = 10,180.12

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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.