Home / 20,997.09-31,493.21-5,415.93

Finding the Fourth Proportional to 20,997.09, 31,493.21 and 5,415.93

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Solution

The fourth proportional to 20,997.09, 31,493.21 and 5,415.93 is: 8,123.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.09 : 31,493.21 = 5,415.93 : x
  2. Step 2: Convert to fraction form
    20,997.09/31,493.21 = 5,415.93/x
  3. Step 3: Cross multiply
    20,997.09x = 31,493.21 × 5,415.93
  4. Step 4: Simplify right side
    20,997.09x = 170,564,993.76
  5. Step 5: Solve for x
    x = 170,564,993.76/20,997.09
  6. Step 6: Final answer
    x = 8,123.27

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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.