Home / 20,801.53-31,202.70-5,218.75

Finding the Fourth Proportional to 20,801.53, 31,202.70 and 5,218.75

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Solution

The fourth proportional to 20,801.53, 31,202.70 and 5,218.75 is: 7,828.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.53 : 31,202.70 = 5,218.75 : x
  2. Step 2: Convert to fraction form
    20,801.53/31,202.70 = 5,218.75/x
  3. Step 3: Cross multiply
    20,801.53x = 31,202.70 × 5,218.75
  4. Step 4: Simplify right side
    20,801.53x = 162,839,090.63
  5. Step 5: Solve for x
    x = 162,839,090.63/20,801.53
  6. Step 6: Final answer
    x = 7,828.23

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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.