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Finding the Fourth Proportional to 11,918.50, 16,447.53 and 7,726.75

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Solution

The fourth proportional to 11,918.50, 16,447.53 and 7,726.75 is: 10,662.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.50 : 16,447.53 = 7,726.75 : x
  2. Step 2: Convert to fraction form
    11,918.50/16,447.53 = 7,726.75/x
  3. Step 3: Cross multiply
    11,918.50x = 16,447.53 × 7,726.75
  4. Step 4: Simplify right side
    11,918.50x = 127,085,952.43
  5. Step 5: Solve for x
    x = 127,085,952.43/11,918.50
  6. Step 6: Final answer
    x = 10,662.92

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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.