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Finding the Fourth Proportional to 18,668.76, 28,007.58 and 5,341.95

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Solution

The fourth proportional to 18,668.76, 28,007.58 and 5,341.95 is: 8,014.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.76 : 28,007.58 = 5,341.95 : x
  2. Step 2: Convert to fraction form
    18,668.76/28,007.58 = 5,341.95/x
  3. Step 3: Cross multiply
    18,668.76x = 28,007.58 × 5,341.95
  4. Step 4: Simplify right side
    18,668.76x = 149,615,091.98
  5. Step 5: Solve for x
    x = 149,615,091.98/18,668.76
  6. Step 6: Final answer
    x = 8,014.20

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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.