Home / 20,777.11-31,157.45-7,622.30

Finding the Fourth Proportional to 20,777.11, 31,157.45 and 7,622.30

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Solution

The fourth proportional to 20,777.11, 31,157.45 and 7,622.30 is: 11,430.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.11 : 31,157.45 = 7,622.30 : x
  2. Step 2: Convert to fraction form
    20,777.11/31,157.45 = 7,622.30/x
  3. Step 3: Cross multiply
    20,777.11x = 31,157.45 × 7,622.30
  4. Step 4: Simplify right side
    20,777.11x = 237,491,431.14
  5. Step 5: Solve for x
    x = 237,491,431.14/20,777.11
  6. Step 6: Final answer
    x = 11,430.44

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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.