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Finding the Fourth Proportional to 12,447.90, 17,177.79 and 6,858.78

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Solution

The fourth proportional to 12,447.90, 17,177.79 and 6,858.78 is: 9,464.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,447.90 : 17,177.79 = 6,858.78 : x
  2. Step 2: Convert to fraction form
    12,447.90/17,177.79 = 6,858.78/x
  3. Step 3: Cross multiply
    12,447.90x = 17,177.79 × 6,858.78
  4. Step 4: Simplify right side
    12,447.90x = 117,818,682.50
  5. Step 5: Solve for x
    x = 117,818,682.50/12,447.90
  6. Step 6: Final answer
    x = 9,464.94

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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.