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Finding the Fourth Proportional to 12,655.56, 17,472.14 and 8,682.51

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Solution

The fourth proportional to 12,655.56, 17,472.14 and 8,682.51 is: 11,986.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.56 : 17,472.14 = 8,682.51 : x
  2. Step 2: Convert to fraction form
    12,655.56/17,472.14 = 8,682.51/x
  3. Step 3: Cross multiply
    12,655.56x = 17,472.14 × 8,682.51
  4. Step 4: Simplify right side
    12,655.56x = 151,701,986.66
  5. Step 5: Solve for x
    x = 151,701,986.66/12,655.56
  6. Step 6: Final answer
    x = 11,986.99

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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.