Home / 13,621.88-18,805.20-9,422.84

Finding the Fourth Proportional to 13,621.88, 18,805.20 and 9,422.84

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Solution

The fourth proportional to 13,621.88, 18,805.20 and 9,422.84 is: 13,008.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.88 : 18,805.20 = 9,422.84 : x
  2. Step 2: Convert to fraction form
    13,621.88/18,805.20 = 9,422.84/x
  3. Step 3: Cross multiply
    13,621.88x = 18,805.20 × 9,422.84
  4. Step 4: Simplify right side
    13,621.88x = 177,198,402.45
  5. Step 5: Solve for x
    x = 177,198,402.45/13,621.88
  6. Step 6: Final answer
    x = 13,008.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.