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Finding the Fourth Proportional to 12,811.26, 17,679.52 and 7,222.26

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Solution

The fourth proportional to 12,811.26, 17,679.52 and 7,222.26 is: 9,966.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.26 : 17,679.52 = 7,222.26 : x
  2. Step 2: Convert to fraction form
    12,811.26/17,679.52 = 7,222.26/x
  3. Step 3: Cross multiply
    12,811.26x = 17,679.52 × 7,222.26
  4. Step 4: Simplify right side
    12,811.26x = 127,686,090.12
  5. Step 5: Solve for x
    x = 127,686,090.12/12,811.26
  6. Step 6: Final answer
    x = 9,966.71

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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.