Home / 20,967.99-31,442.04-7,631.55

Finding the Fourth Proportional to 20,967.99, 31,442.04 and 7,631.55

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Solution

The fourth proportional to 20,967.99, 31,442.04 and 7,631.55 is: 11,443.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.99 : 31,442.04 = 7,631.55 : x
  2. Step 2: Convert to fraction form
    20,967.99/31,442.04 = 7,631.55/x
  3. Step 3: Cross multiply
    20,967.99x = 31,442.04 × 7,631.55
  4. Step 4: Simplify right side
    20,967.99x = 239,951,500.36
  5. Step 5: Solve for x
    x = 239,951,500.36/20,967.99
  6. Step 6: Final answer
    x = 11,443.71

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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.