Home / 30,128.25-45,208.14-21,876.43

Finding the Fourth Proportional to 30,128.25, 45,208.14 and 21,876.43

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Solution

The fourth proportional to 30,128.25, 45,208.14 and 21,876.43 is: 32,826.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128.25 : 45,208.14 = 21,876.43 : x
  2. Step 2: Convert to fraction form
    30,128.25/45,208.14 = 21,876.43/x
  3. Step 3: Cross multiply
    30,128.25x = 45,208.14 × 21,876.43
  4. Step 4: Simplify right side
    30,128.25x = 988,992,710.14
  5. Step 5: Solve for x
    x = 988,992,710.14/30,128.25
  6. Step 6: Final answer
    x = 32,826.09

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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.