Home / 13,281.42-19,921.32-5,490.03

Finding the Fourth Proportional to 13,281.42, 19,921.32 and 5,490.03

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Solution

The fourth proportional to 13,281.42, 19,921.32 and 5,490.03 is: 8,234.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.42 : 19,921.32 = 5,490.03 : x
  2. Step 2: Convert to fraction form
    13,281.42/19,921.32 = 5,490.03/x
  3. Step 3: Cross multiply
    13,281.42x = 19,921.32 × 5,490.03
  4. Step 4: Simplify right side
    13,281.42x = 109,368,644.44
  5. Step 5: Solve for x
    x = 109,368,644.44/13,281.42
  6. Step 6: Final answer
    x = 8,234.71

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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.