Home / 21,516.62-29,612.04-18,203

Finding the Fourth Proportional to 21,516.62, 29,612.04 and 18,203

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Solution

The fourth proportional to 21,516.62, 29,612.04 and 18,203 is: 25,051.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.62 : 29,612.04 = 18,203 : x
  2. Step 2: Convert to fraction form
    21,516.62/29,612.04 = 18,203/x
  3. Step 3: Cross multiply
    21,516.62x = 29,612.04 × 18,203
  4. Step 4: Simplify right side
    21,516.62x = 539,027,964.12
  5. Step 5: Solve for x
    x = 539,027,964.12/21,516.62
  6. Step 6: Final answer
    x = 25,051.70

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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.