Home / 20,977.90-31,471.48-6,942.30

Finding the Fourth Proportional to 20,977.90, 31,471.48 and 6,942.30

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Solution

The fourth proportional to 20,977.90, 31,471.48 and 6,942.30 is: 10,414.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.90 : 31,471.48 = 6,942.30 : x
  2. Step 2: Convert to fraction form
    20,977.90/31,471.48 = 6,942.30/x
  3. Step 3: Cross multiply
    20,977.90x = 31,471.48 × 6,942.30
  4. Step 4: Simplify right side
    20,977.90x = 218,484,455.60
  5. Step 5: Solve for x
    x = 218,484,455.60/20,977.90
  6. Step 6: Final answer
    x = 10,414.98

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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.