Home / 6,144.20-9,216.30-5,415.20

Finding the Fourth Proportional to 6,144.20, 9,216.30 and 5,415.20

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Solution

The fourth proportional to 6,144.20, 9,216.30 and 5,415.20 is: 8,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,144.20 : 9,216.30 = 5,415.20 : x
  2. Step 2: Convert to fraction form
    6,144.20/9,216.30 = 5,415.20/x
  3. Step 3: Cross multiply
    6,144.20x = 9,216.30 × 5,415.20
  4. Step 4: Simplify right side
    6,144.20x = 49,908,107.76
  5. Step 5: Solve for x
    x = 49,908,107.76/6,144.20
  6. Step 6: Final answer
    x = 8,122.80

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Double scale
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Similar ratio
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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.