Home / 20,933.40-31,400.11-7,784.06

Finding the Fourth Proportional to 20,933.40, 31,400.11 and 7,784.06

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Solution

The fourth proportional to 20,933.40, 31,400.11 and 7,784.06 is: 11,676.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.40 : 31,400.11 = 7,784.06 : x
  2. Step 2: Convert to fraction form
    20,933.40/31,400.11 = 7,784.06/x
  3. Step 3: Cross multiply
    20,933.40x = 31,400.11 × 7,784.06
  4. Step 4: Simplify right side
    20,933.40x = 244,420,340.25
  5. Step 5: Solve for x
    x = 244,420,340.25/20,933.40
  6. Step 6: Final answer
    x = 11,676.09

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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.