Home / 18,375.34-25,357.82-9,991.90

Finding the Fourth Proportional to 18,375.34, 25,357.82 and 9,991.90

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Solution

The fourth proportional to 18,375.34, 25,357.82 and 9,991.90 is: 13,788.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,375.34 : 25,357.82 = 9,991.90 : x
  2. Step 2: Convert to fraction form
    18,375.34/25,357.82 = 9,991.90/x
  3. Step 3: Cross multiply
    18,375.34x = 25,357.82 × 9,991.90
  4. Step 4: Simplify right side
    18,375.34x = 253,372,801.66
  5. Step 5: Solve for x
    x = 253,372,801.66/18,375.34
  6. Step 6: Final answer
    x = 13,788.74

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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.