Home / 20,771.16-31,156.82-5,188.80

Finding the Fourth Proportional to 20,771.16, 31,156.82 and 5,188.80

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Solution

The fourth proportional to 20,771.16, 31,156.82 and 5,188.80 is: 7,783.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.16 : 31,156.82 = 5,188.80 : x
  2. Step 2: Convert to fraction form
    20,771.16/31,156.82 = 5,188.80/x
  3. Step 3: Cross multiply
    20,771.16x = 31,156.82 × 5,188.80
  4. Step 4: Simplify right side
    20,771.16x = 161,666,507.62
  5. Step 5: Solve for x
    x = 161,666,507.62/20,771.16
  6. Step 6: Final answer
    x = 7,783.22

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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.