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Finding the Fourth Proportional to 18,390.75, 27,590.19 and 5,243.23

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Solution

The fourth proportional to 18,390.75, 27,590.19 and 5,243.23 is: 7,866.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.75 : 27,590.19 = 5,243.23 : x
  2. Step 2: Convert to fraction form
    18,390.75/27,590.19 = 5,243.23/x
  3. Step 3: Cross multiply
    18,390.75x = 27,590.19 × 5,243.23
  4. Step 4: Simplify right side
    18,390.75x = 144,661,711.91
  5. Step 5: Solve for x
    x = 144,661,711.91/18,390.75
  6. Step 6: Final answer
    x = 7,866.00

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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.