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Finding the Fourth Proportional to 18,763.47, 28,144.67 and 4,723.47

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Solution

The fourth proportional to 18,763.47, 28,144.67 and 4,723.47 is: 7,085.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.47 : 28,144.67 = 4,723.47 : x
  2. Step 2: Convert to fraction form
    18,763.47/28,144.67 = 4,723.47/x
  3. Step 3: Cross multiply
    18,763.47x = 28,144.67 × 4,723.47
  4. Step 4: Simplify right side
    18,763.47x = 132,940,480.79
  5. Step 5: Solve for x
    x = 132,940,480.79/18,763.47
  6. Step 6: Final answer
    x = 7,085.07

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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.