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Finding the Fourth Proportional to 18,686.94, 27,973.17 and 12,100.02

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Solution

The fourth proportional to 18,686.94, 27,973.17 and 12,100.02 is: 18,112.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.94 : 27,973.17 = 12,100.02 : x
  2. Step 2: Convert to fraction form
    18,686.94/27,973.17 = 12,100.02/x
  3. Step 3: Cross multiply
    18,686.94x = 27,973.17 × 12,100.02
  4. Step 4: Simplify right side
    18,686.94x = 338,475,916.46
  5. Step 5: Solve for x
    x = 338,475,916.46/18,686.94
  6. Step 6: Final answer
    x = 18,112.97

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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.