Home / 39,780.36-54,898.20-21,876.66

Finding the Fourth Proportional to 39,780.36, 54,898.20 and 21,876.66

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Solution

The fourth proportional to 39,780.36, 54,898.20 and 21,876.66 is: 30,190.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.36 : 54,898.20 = 21,876.66 : x
  2. Step 2: Convert to fraction form
    39,780.36/54,898.20 = 21,876.66/x
  3. Step 3: Cross multiply
    39,780.36x = 54,898.20 × 21,876.66
  4. Step 4: Simplify right side
    39,780.36x = 1,200,989,256.01
  5. Step 5: Solve for x
    x = 1,200,989,256.01/39,780.36
  6. Step 6: Final answer
    x = 30,190.51

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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.