Home / 20,408.60-30,611.10-5,616.20

Finding the Fourth Proportional to 20,408.60, 30,611.10 and 5,616.20

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Solution

The fourth proportional to 20,408.60, 30,611.10 and 5,616.20 is: 8,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.60 : 30,611.10 = 5,616.20 : x
  2. Step 2: Convert to fraction form
    20,408.60/30,611.10 = 5,616.20/x
  3. Step 3: Cross multiply
    20,408.60x = 30,611.10 × 5,616.20
  4. Step 4: Simplify right side
    20,408.60x = 171,918,059.82
  5. Step 5: Solve for x
    x = 171,918,059.82/20,408.60
  6. Step 6: Final answer
    x = 8,423.80

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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.