Home / 21,246.96-31,866.24-20,193.28

Finding the Fourth Proportional to 21,246.96, 31,866.24 and 20,193.28

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Solution

The fourth proportional to 21,246.96, 31,866.24 and 20,193.28 is: 30,285.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.96 : 31,866.24 = 20,193.28 : x
  2. Step 2: Convert to fraction form
    21,246.96/31,866.24 = 20,193.28/x
  3. Step 3: Cross multiply
    21,246.96x = 31,866.24 × 20,193.28
  4. Step 4: Simplify right side
    21,246.96x = 643,483,906.87
  5. Step 5: Solve for x
    x = 643,483,906.87/21,246.96
  6. Step 6: Final answer
    x = 30,285.93

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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.