Home / 20,758.75-31,139.88-6,530.49

Finding the Fourth Proportional to 20,758.75, 31,139.88 and 6,530.49

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Solution

The fourth proportional to 20,758.75, 31,139.88 and 6,530.49 is: 9,796.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.75 : 31,139.88 = 6,530.49 : x
  2. Step 2: Convert to fraction form
    20,758.75/31,139.88 = 6,530.49/x
  3. Step 3: Cross multiply
    20,758.75x = 31,139.88 × 6,530.49
  4. Step 4: Simplify right side
    20,758.75x = 203,358,767.23
  5. Step 5: Solve for x
    x = 203,358,767.23/20,758.75
  6. Step 6: Final answer
    x = 9,796.29

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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.