Home / 39,795.85-54,917.13-21,646

Finding the Fourth Proportional to 39,795.85, 54,917.13 and 21,646

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Solution

The fourth proportional to 39,795.85, 54,917.13 and 21,646 is: 29,870.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,795.85 : 54,917.13 = 21,646 : x
  2. Step 2: Convert to fraction form
    39,795.85/54,917.13 = 21,646/x
  3. Step 3: Cross multiply
    39,795.85x = 54,917.13 × 21,646
  4. Step 4: Simplify right side
    39,795.85x = 1,188,736,195.98
  5. Step 5: Solve for x
    x = 1,188,736,195.98/39,795.85
  6. Step 6: Final answer
    x = 29,870.86

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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.