Home / 28,221.54-42,339.36-19,917.77

Finding the Fourth Proportional to 28,221.54, 42,339.36 and 19,917.77

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Solution

The fourth proportional to 28,221.54, 42,339.36 and 19,917.77 is: 29,881.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.54 : 42,339.36 = 19,917.77 : x
  2. Step 2: Convert to fraction form
    28,221.54/42,339.36 = 19,917.77/x
  3. Step 3: Cross multiply
    28,221.54x = 42,339.36 × 19,917.77
  4. Step 4: Simplify right side
    28,221.54x = 843,305,422.73
  5. Step 5: Solve for x
    x = 843,305,422.73/28,221.54
  6. Step 6: Final answer
    x = 29,881.62

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1.5x scale

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.