Home / 20,487.45-30,720.87-9,950.85

Finding the Fourth Proportional to 20,487.45, 30,720.87 and 9,950.85

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Solution

The fourth proportional to 20,487.45, 30,720.87 and 9,950.85 is: 14,921.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.45 : 30,720.87 = 9,950.85 : x
  2. Step 2: Convert to fraction form
    20,487.45/30,720.87 = 9,950.85/x
  3. Step 3: Cross multiply
    20,487.45x = 30,720.87 × 9,950.85
  4. Step 4: Simplify right side
    20,487.45x = 305,698,769.24
  5. Step 5: Solve for x
    x = 305,698,769.24/20,487.45
  6. Step 6: Final answer
    x = 14,921.27

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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.