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Finding the Fourth Proportional to 20,579.32, 30,871.04 and 5,586.68

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Solution

The fourth proportional to 20,579.32, 30,871.04 and 5,586.68 is: 8,380.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.32 : 30,871.04 = 5,586.68 : x
  2. Step 2: Convert to fraction form
    20,579.32/30,871.04 = 5,586.68/x
  3. Step 3: Cross multiply
    20,579.32x = 30,871.04 × 5,586.68
  4. Step 4: Simplify right side
    20,579.32x = 172,466,621.75
  5. Step 5: Solve for x
    x = 172,466,621.75/20,579.32
  6. Step 6: Final answer
    x = 8,380.58

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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.