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Finding the Fourth Proportional to 7,649.64, 11,474.98 and 2,455.20

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Solution

The fourth proportional to 7,649.64, 11,474.98 and 2,455.20 is: 3,682.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,649.64 : 11,474.98 = 2,455.20 : x
  2. Step 2: Convert to fraction form
    7,649.64/11,474.98 = 2,455.20/x
  3. Step 3: Cross multiply
    7,649.64x = 11,474.98 × 2,455.20
  4. Step 4: Simplify right side
    7,649.64x = 28,173,370.90
  5. Step 5: Solve for x
    x = 28,173,370.90/7,649.64
  6. Step 6: Final answer
    x = 3,682.97

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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.