Home / 5,429.60-8,138.70-3,456.74

Finding the Fourth Proportional to 5,429.60, 8,138.70 and 3,456.74

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Solution

The fourth proportional to 5,429.60, 8,138.70 and 3,456.74 is: 5,181.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429.60 : 8,138.70 = 3,456.74 : x
  2. Step 2: Convert to fraction form
    5,429.60/8,138.70 = 3,456.74/x
  3. Step 3: Cross multiply
    5,429.60x = 8,138.70 × 3,456.74
  4. Step 4: Simplify right side
    5,429.60x = 28,133,369.84
  5. Step 5: Solve for x
    x = 28,133,369.84/5,429.60
  6. Step 6: Final answer
    x = 5,181.48

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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.