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Finding the Fourth Proportional to 19,917.93, 27,485.64 and 10,963.98

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Solution

The fourth proportional to 19,917.93, 27,485.64 and 10,963.98 is: 15,129.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.93 : 27,485.64 = 10,963.98 : x
  2. Step 2: Convert to fraction form
    19,917.93/27,485.64 = 10,963.98/x
  3. Step 3: Cross multiply
    19,917.93x = 27,485.64 × 10,963.98
  4. Step 4: Simplify right side
    19,917.93x = 301,352,007.25
  5. Step 5: Solve for x
    x = 301,352,007.25/19,917.93
  6. Step 6: Final answer
    x = 15,129.69

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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.