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Finding the Fourth Proportional to 18,504.93, 27,761.52 and 8,638.83

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Solution

The fourth proportional to 18,504.93, 27,761.52 and 8,638.83 is: 12,960.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,504.93 : 27,761.52 = 8,638.83 : x
  2. Step 2: Convert to fraction form
    18,504.93/27,761.52 = 8,638.83/x
  3. Step 3: Cross multiply
    18,504.93x = 27,761.52 × 8,638.83
  4. Step 4: Simplify right side
    18,504.93x = 239,827,051.82
  5. Step 5: Solve for x
    x = 239,827,051.82/18,504.93
  6. Step 6: Final answer
    x = 12,960.17

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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.