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Finding the Fourth Proportional to 18,394.63, 27,555.73 and 12,135.50

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Solution

The fourth proportional to 18,394.63, 27,555.73 and 12,135.50 is: 18,179.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,394.63 : 27,555.73 = 12,135.50 : x
  2. Step 2: Convert to fraction form
    18,394.63/27,555.73 = 12,135.50/x
  3. Step 3: Cross multiply
    18,394.63x = 27,555.73 × 12,135.50
  4. Step 4: Simplify right side
    18,394.63x = 334,402,561.42
  5. Step 5: Solve for x
    x = 334,402,561.42/18,394.63
  6. Step 6: Final answer
    x = 18,179.36

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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.