Home / 21,155.90-29,195.13-11,724.44

Finding the Fourth Proportional to 21,155.90, 29,195.13 and 11,724.44

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Solution

The fourth proportional to 21,155.90, 29,195.13 and 11,724.44 is: 16,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.90 : 29,195.13 = 11,724.44 : x
  2. Step 2: Convert to fraction form
    21,155.90/29,195.13 = 11,724.44/x
  3. Step 3: Cross multiply
    21,155.90x = 29,195.13 × 11,724.44
  4. Step 4: Simplify right side
    21,155.90x = 342,296,549.98
  5. Step 5: Solve for x
    x = 342,296,549.98/21,155.90
  6. Step 6: Final answer
    x = 16,179.72

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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.