Home / 20,819,808.36-31,236,245.75-12,520,164.32

Finding the Fourth Proportional to 20,819,808.36, 31,236,245.75 and 12,520,164.32

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Solution

The fourth proportional to 20,819,808.36, 31,236,245.75 and 12,520,164.32 is: 18,784,175.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819,808.36 : 31,236,245.75 = 12,520,164.32 : x
  2. Step 2: Convert to fraction form
    20,819,808.36/31,236,245.75 = 12,520,164.32/x
  3. Step 3: Cross multiply
    20,819,808.36x = 31,236,245.75 × 12,520,164.32
  4. Step 4: Simplify right side
    20,819,808.36x = 391,082,929,529,901.62
  5. Step 5: Solve for x
    x = 391,082,929,529,901.62/20,819,808.36
  6. Step 6: Final answer
    x = 18,784,175.28

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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.