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Finding the Fourth Proportional to 20,416.60, 30,625.04 and 5,626.32

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Solution

The fourth proportional to 20,416.60, 30,625.04 and 5,626.32 is: 8,439.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,416.60 : 30,625.04 = 5,626.32 : x
  2. Step 2: Convert to fraction form
    20,416.60/30,625.04 = 5,626.32/x
  3. Step 3: Cross multiply
    20,416.60x = 30,625.04 × 5,626.32
  4. Step 4: Simplify right side
    20,416.60x = 172,306,275.05
  5. Step 5: Solve for x
    x = 172,306,275.05/20,416.60
  6. Step 6: Final answer
    x = 8,439.52

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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.