Home / 20,782.54-31,157.50-9,687.76

Finding the Fourth Proportional to 20,782.54, 31,157.50 and 9,687.76

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Solution

The fourth proportional to 20,782.54, 31,157.50 and 9,687.76 is: 14,524.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.54 : 31,157.50 = 9,687.76 : x
  2. Step 2: Convert to fraction form
    20,782.54/31,157.50 = 9,687.76/x
  3. Step 3: Cross multiply
    20,782.54x = 31,157.50 × 9,687.76
  4. Step 4: Simplify right side
    20,782.54x = 301,846,382.20
  5. Step 5: Solve for x
    x = 301,846,382.20/20,782.54
  6. Step 6: Final answer
    x = 14,524.04

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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.