Home / 13,213.40-19,829.70-5,427.80

Finding the Fourth Proportional to 13,213.40, 19,829.70 and 5,427.80

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Solution

The fourth proportional to 13,213.40, 19,829.70 and 5,427.80 is: 8,145.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.40 : 19,829.70 = 5,427.80 : x
  2. Step 2: Convert to fraction form
    13,213.40/19,829.70 = 5,427.80/x
  3. Step 3: Cross multiply
    13,213.40x = 19,829.70 × 5,427.80
  4. Step 4: Simplify right side
    13,213.40x = 107,631,645.66
  5. Step 5: Solve for x
    x = 107,631,645.66/13,213.40
  6. Step 6: Final answer
    x = 8,145.64

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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.