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Finding the Fourth Proportional to 12,486.39, 17,231.19 and 6,897.39

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Solution

The fourth proportional to 12,486.39, 17,231.19 and 6,897.39 is: 9,518.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.39 : 17,231.19 = 6,897.39 : x
  2. Step 2: Convert to fraction form
    12,486.39/17,231.19 = 6,897.39/x
  3. Step 3: Cross multiply
    12,486.39x = 17,231.19 × 6,897.39
  4. Step 4: Simplify right side
    12,486.39x = 118,850,237.59
  5. Step 5: Solve for x
    x = 118,850,237.59/12,486.39
  6. Step 6: Final answer
    x = 9,518.38

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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.