Home / 20,707.03-30,996.15-13,318.21

Finding the Fourth Proportional to 20,707.03, 30,996.15 and 13,318.21

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Solution

The fourth proportional to 20,707.03, 30,996.15 and 13,318.21 is: 19,935.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.03 : 30,996.15 = 13,318.21 : x
  2. Step 2: Convert to fraction form
    20,707.03/30,996.15 = 13,318.21/x
  3. Step 3: Cross multiply
    20,707.03x = 30,996.15 × 13,318.21
  4. Step 4: Simplify right side
    20,707.03x = 412,813,234.89
  5. Step 5: Solve for x
    x = 412,813,234.89/20,707.03
  6. Step 6: Final answer
    x = 19,935.90

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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.