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Finding the Fourth Proportional to 12,929.73, 17,843.26 and 7,187.72

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Solution

The fourth proportional to 12,929.73, 17,843.26 and 7,187.72 is: 9,919.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,929.73 : 17,843.26 = 7,187.72 : x
  2. Step 2: Convert to fraction form
    12,929.73/17,843.26 = 7,187.72/x
  3. Step 3: Cross multiply
    12,929.73x = 17,843.26 × 7,187.72
  4. Step 4: Simplify right side
    12,929.73x = 128,252,356.77
  5. Step 5: Solve for x
    x = 128,252,356.77/12,929.73
  6. Step 6: Final answer
    x = 9,919.19

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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.