Home / 20,984.83-31,477.33-8,505.09

Finding the Fourth Proportional to 20,984.83, 31,477.33 and 8,505.09

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Solution

The fourth proportional to 20,984.83, 31,477.33 and 8,505.09 is: 12,757.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.83 : 31,477.33 = 8,505.09 : x
  2. Step 2: Convert to fraction form
    20,984.83/31,477.33 = 8,505.09/x
  3. Step 3: Cross multiply
    20,984.83x = 31,477.33 × 8,505.09
  4. Step 4: Simplify right side
    20,984.83x = 267,717,524.61
  5. Step 5: Solve for x
    x = 267,717,524.61/20,984.83
  6. Step 6: Final answer
    x = 12,757.67

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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.