Home / 20,807.62-31,219.31-12,493.44

Finding the Fourth Proportional to 20,807.62, 31,219.31 and 12,493.44

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Solution

The fourth proportional to 20,807.62, 31,219.31 and 12,493.44 is: 18,744.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.62 : 31,219.31 = 12,493.44 : x
  2. Step 2: Convert to fraction form
    20,807.62/31,219.31 = 12,493.44/x
  3. Step 3: Cross multiply
    20,807.62x = 31,219.31 × 12,493.44
  4. Step 4: Simplify right side
    20,807.62x = 390,036,513.86
  5. Step 5: Solve for x
    x = 390,036,513.86/20,807.62
  6. Step 6: Final answer
    x = 18,744.89

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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.