Home / 20,660.76-31,000.34-11,775.77

Finding the Fourth Proportional to 20,660.76, 31,000.34 and 11,775.77

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Solution

The fourth proportional to 20,660.76, 31,000.34 and 11,775.77 is: 17,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.76 : 31,000.34 = 11,775.77 : x
  2. Step 2: Convert to fraction form
    20,660.76/31,000.34 = 11,775.77/x
  3. Step 3: Cross multiply
    20,660.76x = 31,000.34 × 11,775.77
  4. Step 4: Simplify right side
    20,660.76x = 365,052,892.38
  5. Step 5: Solve for x
    x = 365,052,892.38/20,660.76
  6. Step 6: Final answer
    x = 17,668.90

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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.