Home / 20,891.19-31,296.30-12,996.81

Finding the Fourth Proportional to 20,891.19, 31,296.30 and 12,996.81

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Solution

The fourth proportional to 20,891.19, 31,296.30 and 12,996.81 is: 19,470.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.19 : 31,296.30 = 12,996.81 : x
  2. Step 2: Convert to fraction form
    20,891.19/31,296.30 = 12,996.81/x
  3. Step 3: Cross multiply
    20,891.19x = 31,296.30 × 12,996.81
  4. Step 4: Simplify right side
    20,891.19x = 406,752,064.80
  5. Step 5: Solve for x
    x = 406,752,064.80/20,891.19
  6. Step 6: Final answer
    x = 19,470.03

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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.