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Finding the Fourth Proportional to 18,239.58, 27,345.70 and 7,721.93

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Solution

The fourth proportional to 18,239.58, 27,345.70 and 7,721.93 is: 11,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,239.58 : 27,345.70 = 7,721.93 : x
  2. Step 2: Convert to fraction form
    18,239.58/27,345.70 = 7,721.93/x
  3. Step 3: Cross multiply
    18,239.58x = 27,345.70 × 7,721.93
  4. Step 4: Simplify right side
    18,239.58x = 211,161,581.20
  5. Step 5: Solve for x
    x = 211,161,581.20/18,239.58
  6. Step 6: Final answer
    x = 11,577.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.