Home / 21,181.80-29,230.02-12,231.84

Finding the Fourth Proportional to 21,181.80, 29,230.02 and 12,231.84

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Solution

The fourth proportional to 21,181.80, 29,230.02 and 12,231.84 is: 16,879.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.80 : 29,230.02 = 12,231.84 : x
  2. Step 2: Convert to fraction form
    21,181.80/29,230.02 = 12,231.84/x
  3. Step 3: Cross multiply
    21,181.80x = 29,230.02 × 12,231.84
  4. Step 4: Simplify right side
    21,181.80x = 357,536,927.84
  5. Step 5: Solve for x
    x = 357,536,927.84/21,181.80
  6. Step 6: Final answer
    x = 16,879.44

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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.