Home / 21,511.20-29,682.28-12,077.94

Finding the Fourth Proportional to 21,511.20, 29,682.28 and 12,077.94

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Solution

The fourth proportional to 21,511.20, 29,682.28 and 12,077.94 is: 16,665.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.20 : 29,682.28 = 12,077.94 : x
  2. Step 2: Convert to fraction form
    21,511.20/29,682.28 = 12,077.94/x
  3. Step 3: Cross multiply
    21,511.20x = 29,682.28 × 12,077.94
  4. Step 4: Simplify right side
    21,511.20x = 358,500,796.90
  5. Step 5: Solve for x
    x = 358,500,796.90/21,511.20
  6. Step 6: Final answer
    x = 16,665.77

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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.