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Finding the Fourth Proportional to 19,992.88, 27,590.21 and 11,040.40

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Solution

The fourth proportional to 19,992.88, 27,590.21 and 11,040.40 is: 15,235.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.88 : 27,590.21 = 11,040.40 : x
  2. Step 2: Convert to fraction form
    19,992.88/27,590.21 = 11,040.40/x
  3. Step 3: Cross multiply
    19,992.88x = 27,590.21 × 11,040.40
  4. Step 4: Simplify right side
    19,992.88x = 304,606,954.48
  5. Step 5: Solve for x
    x = 304,606,954.48/19,992.88
  6. Step 6: Final answer
    x = 15,235.77

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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.