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Finding the Fourth Proportional to 18,668.08, 28,007.13 and 7,582.48

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Solution

The fourth proportional to 18,668.08, 28,007.13 and 7,582.48 is: 11,375.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.08 : 28,007.13 = 7,582.48 : x
  2. Step 2: Convert to fraction form
    18,668.08/28,007.13 = 7,582.48/x
  3. Step 3: Cross multiply
    18,668.08x = 28,007.13 × 7,582.48
  4. Step 4: Simplify right side
    18,668.08x = 212,363,461.50
  5. Step 5: Solve for x
    x = 212,363,461.50/18,668.08
  6. Step 6: Final answer
    x = 11,375.75

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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.