Home / 18,121.20-25,012.72-11,748.08

Finding the Fourth Proportional to 18,121.20, 25,012.72 and 11,748.08

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Solution

The fourth proportional to 18,121.20, 25,012.72 and 11,748.08 is: 16,215.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.20 : 25,012.72 = 11,748.08 : x
  2. Step 2: Convert to fraction form
    18,121.20/25,012.72 = 11,748.08/x
  3. Step 3: Cross multiply
    18,121.20x = 25,012.72 × 11,748.08
  4. Step 4: Simplify right side
    18,121.20x = 293,851,435.58
  5. Step 5: Solve for x
    x = 293,851,435.58/18,121.20
  6. Step 6: Final answer
    x = 16,215.89

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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.