Home / 20,935.89-31,403.85-7,786.56

Finding the Fourth Proportional to 20,935.89, 31,403.85 and 7,786.56

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Solution

The fourth proportional to 20,935.89, 31,403.85 and 7,786.56 is: 11,679.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.89 : 31,403.85 = 7,786.56 : x
  2. Step 2: Convert to fraction form
    20,935.89/31,403.85 = 7,786.56/x
  3. Step 3: Cross multiply
    20,935.89x = 31,403.85 × 7,786.56
  4. Step 4: Simplify right side
    20,935.89x = 244,527,962.26
  5. Step 5: Solve for x
    x = 244,527,962.26/20,935.89
  6. Step 6: Final answer
    x = 11,679.85

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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.