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Finding the Fourth Proportional to 36,018.40, 54,051.90 and 21,211.60

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Solution

The fourth proportional to 36,018.40, 54,051.90 and 21,211.60 is: 31,831.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,018.40 : 54,051.90 = 21,211.60 : x
  2. Step 2: Convert to fraction form
    36,018.40/54,051.90 = 21,211.60/x
  3. Step 3: Cross multiply
    36,018.40x = 54,051.90 × 21,211.60
  4. Step 4: Simplify right side
    36,018.40x = 1,146,527,282.04
  5. Step 5: Solve for x
    x = 1,146,527,282.04/36,018.40
  6. Step 6: Final answer
    x = 31,831.71

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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.