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Finding the Fourth Proportional to 18,558.80, 27,838.02 and 4,707.80

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Solution

The fourth proportional to 18,558.80, 27,838.02 and 4,707.80 is: 7,061.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,558.80 : 27,838.02 = 4,707.80 : x
  2. Step 2: Convert to fraction form
    18,558.80/27,838.02 = 4,707.80/x
  3. Step 3: Cross multiply
    18,558.80x = 27,838.02 × 4,707.80
  4. Step 4: Simplify right side
    18,558.80x = 131,055,830.56
  5. Step 5: Solve for x
    x = 131,055,830.56/18,558.80
  6. Step 6: Final answer
    x = 7,061.65

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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.