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Finding the Fourth Proportional to 5,679.68, 7,838.04 and 3,161.60

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Solution

The fourth proportional to 5,679.68, 7,838.04 and 3,161.60 is: 4,363.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.68 : 7,838.04 = 3,161.60 : x
  2. Step 2: Convert to fraction form
    5,679.68/7,838.04 = 3,161.60/x
  3. Step 3: Cross multiply
    5,679.68x = 7,838.04 × 3,161.60
  4. Step 4: Simplify right side
    5,679.68x = 24,780,747.26
  5. Step 5: Solve for x
    x = 24,780,747.26/5,679.68
  6. Step 6: Final answer
    x = 4,363.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.