Home / 28,111.80-42,126-11,451.48

Finding the Fourth Proportional to 28,111.80, 42,126 and 11,451.48

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Solution

The fourth proportional to 28,111.80, 42,126 and 11,451.48 is: 17,160.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.80 : 42,126 = 11,451.48 : x
  2. Step 2: Convert to fraction form
    28,111.80/42,126 = 11,451.48/x
  3. Step 3: Cross multiply
    28,111.80x = 42,126 × 11,451.48
  4. Step 4: Simplify right side
    28,111.80x = 482,405,046.48
  5. Step 5: Solve for x
    x = 482,405,046.48/28,111.80
  6. Step 6: Final answer
    x = 17,160.23

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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.