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Finding the Fourth Proportional to 11,918.85, 16,448.04 and 6,613.68

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Solution

The fourth proportional to 11,918.85, 16,448.04 and 6,613.68 is: 9,126.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.85 : 16,448.04 = 6,613.68 : x
  2. Step 2: Convert to fraction form
    11,918.85/16,448.04 = 6,613.68/x
  3. Step 3: Cross multiply
    11,918.85x = 16,448.04 × 6,613.68
  4. Step 4: Simplify right side
    11,918.85x = 108,782,073.19
  5. Step 5: Solve for x
    x = 108,782,073.19/11,918.85
  6. Step 6: Final answer
    x = 9,126.89

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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.