Home / 20,315.35-30,475.05-7,661.90

Finding the Fourth Proportional to 20,315.35, 30,475.05 and 7,661.90

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Solution

The fourth proportional to 20,315.35, 30,475.05 and 7,661.90 is: 11,493.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.35 : 30,475.05 = 7,661.90 : x
  2. Step 2: Convert to fraction form
    20,315.35/30,475.05 = 7,661.90/x
  3. Step 3: Cross multiply
    20,315.35x = 30,475.05 × 7,661.90
  4. Step 4: Simplify right side
    20,315.35x = 233,496,861.78
  5. Step 5: Solve for x
    x = 233,496,861.78/20,315.35
  6. Step 6: Final answer
    x = 11,493.62

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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.