Home / 21,511.27-29,682.35-12,078.01

Finding the Fourth Proportional to 21,511.27, 29,682.35 and 12,078.01

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Solution

The fourth proportional to 21,511.27, 29,682.35 and 12,078.01 is: 16,665.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.27 : 29,682.35 = 12,078.01 : x
  2. Step 2: Convert to fraction form
    21,511.27/29,682.35 = 12,078.01/x
  3. Step 3: Cross multiply
    21,511.27x = 29,682.35 × 12,078.01
  4. Step 4: Simplify right side
    21,511.27x = 358,503,659.73
  5. Step 5: Solve for x
    x = 358,503,659.73/21,511.27
  6. Step 6: Final answer
    x = 16,665.85

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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.