Home / 28,514.70-42,687.14-21,151.80

Finding the Fourth Proportional to 28,514.70, 42,687.14 and 21,151.80

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Solution

The fourth proportional to 28,514.70, 42,687.14 and 21,151.80 is: 31,664.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,514.70 : 42,687.14 = 21,151.80 : x
  2. Step 2: Convert to fraction form
    28,514.70/42,687.14 = 21,151.80/x
  3. Step 3: Cross multiply
    28,514.70x = 42,687.14 × 21,151.80
  4. Step 4: Simplify right side
    28,514.70x = 902,909,742.09
  5. Step 5: Solve for x
    x = 902,909,742.09/28,514.70
  6. Step 6: Final answer
    x = 31,664.71

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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.