Home / 21,181.37-29,226.42-12,225.60

Finding the Fourth Proportional to 21,181.37, 29,226.42 and 12,225.60

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Solution

The fourth proportional to 21,181.37, 29,226.42 and 12,225.60 is: 16,869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.37 : 29,226.42 = 12,225.60 : x
  2. Step 2: Convert to fraction form
    21,181.37/29,226.42 = 12,225.60/x
  3. Step 3: Cross multiply
    21,181.37x = 29,226.42 × 12,225.60
  4. Step 4: Simplify right side
    21,181.37x = 357,310,520.35
  5. Step 5: Solve for x
    x = 357,310,520.35/21,181.37
  6. Step 6: Final answer
    x = 16,869.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.