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Finding the Fourth Proportional to 11,963.78, 16,508.79 and 6,929.63

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Solution

The fourth proportional to 11,963.78, 16,508.79 and 6,929.63 is: 9,562.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,963.78 : 16,508.79 = 6,929.63 : x
  2. Step 2: Convert to fraction form
    11,963.78/16,508.79 = 6,929.63/x
  3. Step 3: Cross multiply
    11,963.78x = 16,508.79 × 6,929.63
  4. Step 4: Simplify right side
    11,963.78x = 114,399,813.07
  5. Step 5: Solve for x
    x = 114,399,813.07/11,963.78
  6. Step 6: Final answer
    x = 9,562.18

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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.