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Finding the Fourth Proportional to 8,636.90, 11,920.92 and 5,492.48

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Solution

The fourth proportional to 8,636.90, 11,920.92 and 5,492.48 is: 7,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.90 : 11,920.92 = 5,492.48 : x
  2. Step 2: Convert to fraction form
    8,636.90/11,920.92 = 5,492.48/x
  3. Step 3: Cross multiply
    8,636.90x = 11,920.92 × 5,492.48
  4. Step 4: Simplify right side
    8,636.90x = 65,475,414.68
  5. Step 5: Solve for x
    x = 65,475,414.68/8,636.90
  6. Step 6: Final answer
    x = 7,580.89

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1.5x scale

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.