Home / 20,859.66-31,299.75-8,379.18

Finding the Fourth Proportional to 20,859.66, 31,299.75 and 8,379.18

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Solution

The fourth proportional to 20,859.66, 31,299.75 and 8,379.18 is: 12,572.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.66 : 31,299.75 = 8,379.18 : x
  2. Step 2: Convert to fraction form
    20,859.66/31,299.75 = 8,379.18/x
  3. Step 3: Cross multiply
    20,859.66x = 31,299.75 × 8,379.18
  4. Step 4: Simplify right side
    20,859.66x = 262,266,239.21
  5. Step 5: Solve for x
    x = 262,266,239.21/20,859.66
  6. Step 6: Final answer
    x = 12,572.89

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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.