Home / 20,929.80-31,394.70-8,617.80

Finding the Fourth Proportional to 20,929.80, 31,394.70 and 8,617.80

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Solution

The fourth proportional to 20,929.80, 31,394.70 and 8,617.80 is: 12,926.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.80 : 31,394.70 = 8,617.80 : x
  2. Step 2: Convert to fraction form
    20,929.80/31,394.70 = 8,617.80/x
  3. Step 3: Cross multiply
    20,929.80x = 31,394.70 × 8,617.80
  4. Step 4: Simplify right side
    20,929.80x = 270,553,245.66
  5. Step 5: Solve for x
    x = 270,553,245.66/20,929.80
  6. Step 6: Final answer
    x = 12,926.70

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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.