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Finding the Fourth Proportional to 12,691.27, 18,946.07 and 11,030.97

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Solution

The fourth proportional to 12,691.27, 18,946.07 and 11,030.97 is: 16,467.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.27 : 18,946.07 = 11,030.97 : x
  2. Step 2: Convert to fraction form
    12,691.27/18,946.07 = 11,030.97/x
  3. Step 3: Cross multiply
    12,691.27x = 18,946.07 × 11,030.97
  4. Step 4: Simplify right side
    12,691.27x = 208,993,474.63
  5. Step 5: Solve for x
    x = 208,993,474.63/12,691.27
  6. Step 6: Final answer
    x = 16,467.50

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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.