Home / 13,281.38-19,922.09-5,490.39

Finding the Fourth Proportional to 13,281.38, 19,922.09 and 5,490.39

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Solution

The fourth proportional to 13,281.38, 19,922.09 and 5,490.39 is: 8,235.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.38 : 19,922.09 = 5,490.39 : x
  2. Step 2: Convert to fraction form
    13,281.38/19,922.09 = 5,490.39/x
  3. Step 3: Cross multiply
    13,281.38x = 19,922.09 × 5,490.39
  4. Step 4: Simplify right side
    13,281.38x = 109,380,016.26
  5. Step 5: Solve for x
    x = 109,380,016.26/13,281.38
  6. Step 6: Final answer
    x = 8,235.59

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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.