Home / 20,643.40-30,961.85-17,155.82

Finding the Fourth Proportional to 20,643.40, 30,961.85 and 17,155.82

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Solution

The fourth proportional to 20,643.40, 30,961.85 and 17,155.82 is: 25,731.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.40 : 30,961.85 = 17,155.82 : x
  2. Step 2: Convert to fraction form
    20,643.40/30,961.85 = 17,155.82/x
  3. Step 3: Cross multiply
    20,643.40x = 30,961.85 × 17,155.82
  4. Step 4: Simplify right side
    20,643.40x = 531,175,917.09
  5. Step 5: Solve for x
    x = 531,175,917.09/20,643.40
  6. Step 6: Final answer
    x = 25,731.03

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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.