Home / 13,412-20,100.72-9,921.44

Finding the Fourth Proportional to 13,412, 20,100.72 and 9,921.44

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Solution

The fourth proportional to 13,412, 20,100.72 and 9,921.44 is: 14,869.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412 : 20,100.72 = 9,921.44 : x
  2. Step 2: Convert to fraction form
    13,412/20,100.72 = 9,921.44/x
  3. Step 3: Cross multiply
    13,412x = 20,100.72 × 9,921.44
  4. Step 4: Simplify right side
    13,412x = 199,428,087.44
  5. Step 5: Solve for x
    x = 199,428,087.44/13,412
  6. Step 6: Final answer
    x = 14,869.38

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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.