Home / 21,318.60-31,977.60-9,631.80

Finding the Fourth Proportional to 21,318.60, 31,977.60 and 9,631.80

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Solution

The fourth proportional to 21,318.60, 31,977.60 and 9,631.80 is: 14,447.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.60 : 31,977.60 = 9,631.80 : x
  2. Step 2: Convert to fraction form
    21,318.60/31,977.60 = 9,631.80/x
  3. Step 3: Cross multiply
    21,318.60x = 31,977.60 × 9,631.80
  4. Step 4: Simplify right side
    21,318.60x = 308,001,847.68
  5. Step 5: Solve for x
    x = 308,001,847.68/21,318.60
  6. Step 6: Final answer
    x = 14,447.56

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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.