Home / 28,610.26-42,786.47-21,857.90

Finding the Fourth Proportional to 28,610.26, 42,786.47 and 21,857.90

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Solution

The fourth proportional to 28,610.26, 42,786.47 and 21,857.90 is: 32,688.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,610.26 : 42,786.47 = 21,857.90 : x
  2. Step 2: Convert to fraction form
    28,610.26/42,786.47 = 21,857.90/x
  3. Step 3: Cross multiply
    28,610.26x = 42,786.47 × 21,857.90
  4. Step 4: Simplify right side
    28,610.26x = 935,222,462.26
  5. Step 5: Solve for x
    x = 935,222,462.26/28,610.26
  6. Step 6: Final answer
    x = 32,688.36

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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.