Home / 12,357.78-18,538.50-3,591.56

Finding the Fourth Proportional to 12,357.78, 18,538.50 and 3,591.56

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Solution

The fourth proportional to 12,357.78, 18,538.50 and 3,591.56 is: 5,387.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,357.78 : 18,538.50 = 3,591.56 : x
  2. Step 2: Convert to fraction form
    12,357.78/18,538.50 = 3,591.56/x
  3. Step 3: Cross multiply
    12,357.78x = 18,538.50 × 3,591.56
  4. Step 4: Simplify right side
    12,357.78x = 66,582,135.06
  5. Step 5: Solve for x
    x = 66,582,135.06/12,357.78
  6. Step 6: Final answer
    x = 5,387.87

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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.