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Finding the Fourth Proportional to 13,308, 18,364.68 and 7,339.68

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Solution

The fourth proportional to 13,308, 18,364.68 and 7,339.68 is: 10,128.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,308 : 18,364.68 = 7,339.68 : x
  2. Step 2: Convert to fraction form
    13,308/18,364.68 = 7,339.68/x
  3. Step 3: Cross multiply
    13,308x = 18,364.68 × 7,339.68
  4. Step 4: Simplify right side
    13,308x = 134,790,874.50
  5. Step 5: Solve for x
    x = 134,790,874.50/13,308
  6. Step 6: Final answer
    x = 10,128.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.