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Finding the Fourth Proportional to 18,606.70, 27,901.95 and 6,121.90

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Solution

The fourth proportional to 18,606.70, 27,901.95 and 6,121.90 is: 9,180.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,606.70 : 27,901.95 = 6,121.90 : x
  2. Step 2: Convert to fraction form
    18,606.70/27,901.95 = 6,121.90/x
  3. Step 3: Cross multiply
    18,606.70x = 27,901.95 × 6,121.90
  4. Step 4: Simplify right side
    18,606.70x = 170,812,947.71
  5. Step 5: Solve for x
    x = 170,812,947.71/18,606.70
  6. Step 6: Final answer
    x = 9,180.18

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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.