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Finding the Fourth Proportional to 7,939.42, 11,909.04 and 2,745.22

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Solution

The fourth proportional to 7,939.42, 11,909.04 and 2,745.22 is: 4,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.42 : 11,909.04 = 2,745.22 : x
  2. Step 2: Convert to fraction form
    7,939.42/11,909.04 = 2,745.22/x
  3. Step 3: Cross multiply
    7,939.42x = 11,909.04 × 2,745.22
  4. Step 4: Simplify right side
    7,939.42x = 32,692,934.79
  5. Step 5: Solve for x
    x = 32,692,934.79/7,939.42
  6. Step 6: Final answer
    x = 4,117.80

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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.