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Finding the Fourth Proportional to 11,918.64, 16,447.73 and 6,613.46

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Solution

The fourth proportional to 11,918.64, 16,447.73 and 6,613.46 is: 9,126.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.64 : 16,447.73 = 6,613.46 : x
  2. Step 2: Convert to fraction form
    11,918.64/16,447.73 = 6,613.46/x
  3. Step 3: Cross multiply
    11,918.64x = 16,447.73 × 6,613.46
  4. Step 4: Simplify right side
    11,918.64x = 108,776,289.14
  5. Step 5: Solve for x
    x = 108,776,289.14/11,918.64
  6. Step 6: Final answer
    x = 9,126.57

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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.