Home / 20,769,828.80-31,154,743.20-11,811,876.80

Finding the Fourth Proportional to 20,769,828.80, 31,154,743.20 and 11,811,876.80

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Solution

The fourth proportional to 20,769,828.80, 31,154,743.20 and 11,811,876.80 is: 17,717,815.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769,828.80 : 31,154,743.20 = 11,811,876.80 : x
  2. Step 2: Convert to fraction form
    20,769,828.80/31,154,743.20 = 11,811,876.80/x
  3. Step 3: Cross multiply
    20,769,828.80x = 31,154,743.20 × 11,811,876.80
  4. Step 4: Simplify right side
    20,769,828.80x = 367,995,988,414,037.75
  5. Step 5: Solve for x
    x = 367,995,988,414,037.75/20,769,828.80
  6. Step 6: Final answer
    x = 17,717,815.20

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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.