Home / 20,769,856.80-31,154,785.20-11,811,904.80

Finding the Fourth Proportional to 20,769,856.80, 31,154,785.20 and 11,811,904.80

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Solution

The fourth proportional to 20,769,856.80, 31,154,785.20 and 11,811,904.80 is: 17,717,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769,856.80 : 31,154,785.20 = 11,811,904.80 : x
  2. Step 2: Convert to fraction form
    20,769,856.80/31,154,785.20 = 11,811,904.80/x
  3. Step 3: Cross multiply
    20,769,856.80x = 31,154,785.20 × 11,811,904.80
  4. Step 4: Simplify right side
    20,769,856.80x = 367,997,356,846,849
  5. Step 5: Solve for x
    x = 367,997,356,846,849/20,769,856.80
  6. Step 6: Final answer
    x = 17,717,857.20

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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.