Home / 20,815.76-31,222.68-7,667.24

Finding the Fourth Proportional to 20,815.76, 31,222.68 and 7,667.24

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Solution

The fourth proportional to 20,815.76, 31,222.68 and 7,667.24 is: 11,500.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.76 : 31,222.68 = 7,667.24 : x
  2. Step 2: Convert to fraction form
    20,815.76/31,222.68 = 7,667.24/x
  3. Step 3: Cross multiply
    20,815.76x = 31,222.68 × 7,667.24
  4. Step 4: Simplify right side
    20,815.76x = 239,391,781.00
  5. Step 5: Solve for x
    x = 239,391,781.00/20,815.76
  6. Step 6: Final answer
    x = 11,500.51

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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.