Home / 20,758.58-31,135.57-7,431.04

Finding the Fourth Proportional to 20,758.58, 31,135.57 and 7,431.04

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Solution

The fourth proportional to 20,758.58, 31,135.57 and 7,431.04 is: 11,145.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.58 : 31,135.57 = 7,431.04 : x
  2. Step 2: Convert to fraction form
    20,758.58/31,135.57 = 7,431.04/x
  3. Step 3: Cross multiply
    20,758.58x = 31,135.57 × 7,431.04
  4. Step 4: Simplify right side
    20,758.58x = 231,369,666.09
  5. Step 5: Solve for x
    x = 231,369,666.09/20,758.58
  6. Step 6: Final answer
    x = 11,145.74

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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.