Home / 20,579.40-30,918.30-13,198.32

Finding the Fourth Proportional to 20,579.40, 30,918.30 and 13,198.32

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Solution

The fourth proportional to 20,579.40, 30,918.30 and 13,198.32 is: 19,829.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.40 : 30,918.30 = 13,198.32 : x
  2. Step 2: Convert to fraction form
    20,579.40/30,918.30 = 13,198.32/x
  3. Step 3: Cross multiply
    20,579.40x = 30,918.30 × 13,198.32
  4. Step 4: Simplify right side
    20,579.40x = 408,069,617.26
  5. Step 5: Solve for x
    x = 408,069,617.26/20,579.40
  6. Step 6: Final answer
    x = 19,829.03

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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.