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Finding the Fourth Proportional to 8,609.14, 11,878.68 and 5,072.68

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Solution

The fourth proportional to 8,609.14, 11,878.68 and 5,072.68 is: 6,999.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.14 : 11,878.68 = 5,072.68 : x
  2. Step 2: Convert to fraction form
    8,609.14/11,878.68 = 5,072.68/x
  3. Step 3: Cross multiply
    8,609.14x = 11,878.68 × 5,072.68
  4. Step 4: Simplify right side
    8,609.14x = 60,256,742.46
  5. Step 5: Solve for x
    x = 60,256,742.46/8,609.14
  6. Step 6: Final answer
    x = 6,999.16

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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.