Home / 20,720.82-31,021.02-18,583.64

Finding the Fourth Proportional to 20,720.82, 31,021.02 and 18,583.64

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Solution

The fourth proportional to 20,720.82, 31,021.02 and 18,583.64 is: 27,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.82 : 31,021.02 = 18,583.64 : x
  2. Step 2: Convert to fraction form
    20,720.82/31,021.02 = 18,583.64/x
  3. Step 3: Cross multiply
    20,720.82x = 31,021.02 × 18,583.64
  4. Step 4: Simplify right side
    20,720.82x = 576,483,313.01
  5. Step 5: Solve for x
    x = 576,483,313.01/20,720.82
  6. Step 6: Final answer
    x = 27,821.45

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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.