Home / 20,385.89-30,560.13-7,902.71

Finding the Fourth Proportional to 20,385.89, 30,560.13 and 7,902.71

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Solution

The fourth proportional to 20,385.89, 30,560.13 and 7,902.71 is: 11,846.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.89 : 30,560.13 = 7,902.71 : x
  2. Step 2: Convert to fraction form
    20,385.89/30,560.13 = 7,902.71/x
  3. Step 3: Cross multiply
    20,385.89x = 30,560.13 × 7,902.71
  4. Step 4: Simplify right side
    20,385.89x = 241,507,692.15
  5. Step 5: Solve for x
    x = 241,507,692.15/20,385.89
  6. Step 6: Final answer
    x = 11,846.81

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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.