Home / 20,896.28-31,355.76-13,859

Finding the Fourth Proportional to 20,896.28, 31,355.76 and 13,859

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Solution

The fourth proportional to 20,896.28, 31,355.76 and 13,859 is: 20,796.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.28 : 31,355.76 = 13,859 : x
  2. Step 2: Convert to fraction form
    20,896.28/31,355.76 = 13,859/x
  3. Step 3: Cross multiply
    20,896.28x = 31,355.76 × 13,859
  4. Step 4: Simplify right side
    20,896.28x = 434,559,477.84
  5. Step 5: Solve for x
    x = 434,559,477.84/20,896.28
  6. Step 6: Final answer
    x = 20,796.02

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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.