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Finding the Fourth Proportional to 19,617.88, 27,070.32 and 11,121

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Solution

The fourth proportional to 19,617.88, 27,070.32 and 11,121 is: 15,345.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,617.88 : 27,070.32 = 11,121 : x
  2. Step 2: Convert to fraction form
    19,617.88/27,070.32 = 11,121/x
  3. Step 3: Cross multiply
    19,617.88x = 27,070.32 × 11,121
  4. Step 4: Simplify right side
    19,617.88x = 301,049,028.72
  5. Step 5: Solve for x
    x = 301,049,028.72/19,617.88
  6. Step 6: Final answer
    x = 15,345.65

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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.