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Finding the Fourth Proportional to 18,983.65, 28,470.54 and 5,653.52

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Solution

The fourth proportional to 18,983.65, 28,470.54 and 5,653.52 is: 8,478.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.65 : 28,470.54 = 5,653.52 : x
  2. Step 2: Convert to fraction form
    18,983.65/28,470.54 = 5,653.52/x
  3. Step 3: Cross multiply
    18,983.65x = 28,470.54 × 5,653.52
  4. Step 4: Simplify right side
    18,983.65x = 160,958,767.30
  5. Step 5: Solve for x
    x = 160,958,767.30/18,983.65
  6. Step 6: Final answer
    x = 8,478.81

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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.