Home / 20,767.75-31,164.59-8,455.75

Finding the Fourth Proportional to 20,767.75, 31,164.59 and 8,455.75

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Solution

The fourth proportional to 20,767.75, 31,164.59 and 8,455.75 is: 12,688.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.75 : 31,164.59 = 8,455.75 : x
  2. Step 2: Convert to fraction form
    20,767.75/31,164.59 = 8,455.75/x
  3. Step 3: Cross multiply
    20,767.75x = 31,164.59 × 8,455.75
  4. Step 4: Simplify right side
    20,767.75x = 263,519,981.89
  5. Step 5: Solve for x
    x = 263,519,981.89/20,767.75
  6. Step 6: Final answer
    x = 12,688.90

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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.