Home / 39,780.35-54,896.87-21,876.51

Finding the Fourth Proportional to 39,780.35, 54,896.87 and 21,876.51

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Solution

The fourth proportional to 39,780.35, 54,896.87 and 21,876.51 is: 30,189.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.35 : 54,896.87 = 21,876.51 : x
  2. Step 2: Convert to fraction form
    39,780.35/54,896.87 = 21,876.51/x
  3. Step 3: Cross multiply
    39,780.35x = 54,896.87 × 21,876.51
  4. Step 4: Simplify right side
    39,780.35x = 1,200,951,925.52
  5. Step 5: Solve for x
    x = 1,200,951,925.52/39,780.35
  6. Step 6: Final answer
    x = 30,189.58

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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.