Home / 20,771.70-31,157.55-18,525.30

Finding the Fourth Proportional to 20,771.70, 31,157.55 and 18,525.30

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Solution

The fourth proportional to 20,771.70, 31,157.55 and 18,525.30 is: 27,787.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.70 : 31,157.55 = 18,525.30 : x
  2. Step 2: Convert to fraction form
    20,771.70/31,157.55 = 18,525.30/x
  3. Step 3: Cross multiply
    20,771.70x = 31,157.55 × 18,525.30
  4. Step 4: Simplify right side
    20,771.70x = 577,202,961.02
  5. Step 5: Solve for x
    x = 577,202,961.02/20,771.70
  6. Step 6: Final answer
    x = 27,787.95

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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.