Home / 12,157.44-18,240.68-5,139.28

Finding the Fourth Proportional to 12,157.44, 18,240.68 and 5,139.28

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Solution

The fourth proportional to 12,157.44, 18,240.68 and 5,139.28 is: 7,710.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.44 : 18,240.68 = 5,139.28 : x
  2. Step 2: Convert to fraction form
    12,157.44/18,240.68 = 5,139.28/x
  3. Step 3: Cross multiply
    12,157.44x = 18,240.68 × 5,139.28
  4. Step 4: Simplify right side
    12,157.44x = 93,743,961.91
  5. Step 5: Solve for x
    x = 93,743,961.91/12,157.44
  6. Step 6: Final answer
    x = 7,710.83

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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.