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Finding the Fourth Proportional to 18,309.48, 27,480 and 12,051.68

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Solution

The fourth proportional to 18,309.48, 27,480 and 12,051.68 is: 18,087.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309.48 : 27,480 = 12,051.68 : x
  2. Step 2: Convert to fraction form
    18,309.48/27,480 = 12,051.68/x
  3. Step 3: Cross multiply
    18,309.48x = 27,480 × 12,051.68
  4. Step 4: Simplify right side
    18,309.48x = 331,180,166.40
  5. Step 5: Solve for x
    x = 331,180,166.40/18,309.48
  6. Step 6: Final answer
    x = 18,087.91

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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.