Home / 20,621.37-30,910.93-8,136.35

Finding the Fourth Proportional to 20,621.37, 30,910.93 and 8,136.35

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Solution

The fourth proportional to 20,621.37, 30,910.93 and 8,136.35 is: 12,196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.37 : 30,910.93 = 8,136.35 : x
  2. Step 2: Convert to fraction form
    20,621.37/30,910.93 = 8,136.35/x
  3. Step 3: Cross multiply
    20,621.37x = 30,910.93 × 8,136.35
  4. Step 4: Simplify right side
    20,621.37x = 251,501,970.41
  5. Step 5: Solve for x
    x = 251,501,970.41/20,621.37
  6. Step 6: Final answer
    x = 12,196.18

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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.