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Finding the Fourth Proportional to 12,679.89, 17,498.24 and 7,090.89

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Solution

The fourth proportional to 12,679.89, 17,498.24 and 7,090.89 is: 9,785.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.89 : 17,498.24 = 7,090.89 : x
  2. Step 2: Convert to fraction form
    12,679.89/17,498.24 = 7,090.89/x
  3. Step 3: Cross multiply
    12,679.89x = 17,498.24 × 7,090.89
  4. Step 4: Simplify right side
    12,679.89x = 124,078,059.58
  5. Step 5: Solve for x
    x = 124,078,059.58/12,679.89
  6. Step 6: Final answer
    x = 9,785.42

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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.