Home / 20,720.84-31,021.38-18,584.20

Finding the Fourth Proportional to 20,720.84, 31,021.38 and 18,584.20

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Solution

The fourth proportional to 20,720.84, 31,021.38 and 18,584.20 is: 27,822.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.84 : 31,021.38 = 18,584.20 : x
  2. Step 2: Convert to fraction form
    20,720.84/31,021.38 = 18,584.20/x
  3. Step 3: Cross multiply
    20,720.84x = 31,021.38 × 18,584.20
  4. Step 4: Simplify right side
    20,720.84x = 576,507,530.20
  5. Step 5: Solve for x
    x = 576,507,530.20/20,720.84
  6. Step 6: Final answer
    x = 27,822.59

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1.5x scale

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.