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Finding the Fourth Proportional to 12,679.39, 17,497.54 and 7,090.39

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Solution

The fourth proportional to 12,679.39, 17,497.54 and 7,090.39 is: 9,784.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.39 : 17,497.54 = 7,090.39 : x
  2. Step 2: Convert to fraction form
    12,679.39/17,497.54 = 7,090.39/x
  3. Step 3: Cross multiply
    12,679.39x = 17,497.54 × 7,090.39
  4. Step 4: Simplify right side
    12,679.39x = 124,064,382.64
  5. Step 5: Solve for x
    x = 124,064,382.64/12,679.39
  6. Step 6: Final answer
    x = 9,784.73

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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.