Home / 21,511.24-29,682.90-12,077.80

Finding the Fourth Proportional to 21,511.24, 29,682.90 and 12,077.80

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Solution

The fourth proportional to 21,511.24, 29,682.90 and 12,077.80 is: 16,665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.24 : 29,682.90 = 12,077.80 : x
  2. Step 2: Convert to fraction form
    21,511.24/29,682.90 = 12,077.80/x
  3. Step 3: Cross multiply
    21,511.24x = 29,682.90 × 12,077.80
  4. Step 4: Simplify right side
    21,511.24x = 358,504,129.62
  5. Step 5: Solve for x
    x = 358,504,129.62/21,511.24
  6. Step 6: Final answer
    x = 16,665.90

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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.