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Finding the Fourth Proportional to 12,682.70, 18,932.40 and 11,127.50

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Solution

The fourth proportional to 12,682.70, 18,932.40 and 11,127.50 is: 16,610.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,682.70 : 18,932.40 = 11,127.50 : x
  2. Step 2: Convert to fraction form
    12,682.70/18,932.40 = 11,127.50/x
  3. Step 3: Cross multiply
    12,682.70x = 18,932.40 × 11,127.50
  4. Step 4: Simplify right side
    12,682.70x = 210,670,225.36
  5. Step 5: Solve for x
    x = 210,670,225.36/12,682.70
  6. Step 6: Final answer
    x = 16,610.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.