Home / 21,355.36-29,470.42-11,923.92

Finding the Fourth Proportional to 21,355.36, 29,470.42 and 11,923.92

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Solution

The fourth proportional to 21,355.36, 29,470.42 and 11,923.92 is: 16,455.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355.36 : 29,470.42 = 11,923.92 : x
  2. Step 2: Convert to fraction form
    21,355.36/29,470.42 = 11,923.92/x
  3. Step 3: Cross multiply
    21,355.36x = 29,470.42 × 11,923.92
  4. Step 4: Simplify right side
    21,355.36x = 351,402,930.45
  5. Step 5: Solve for x
    x = 351,402,930.45/21,355.36
  6. Step 6: Final answer
    x = 16,455.02

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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.