Home / 21,238.73-29,310.19-11,679.34

Finding the Fourth Proportional to 21,238.73, 29,310.19 and 11,679.34

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Solution

The fourth proportional to 21,238.73, 29,310.19 and 11,679.34 is: 16,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.73 : 29,310.19 = 11,679.34 : x
  2. Step 2: Convert to fraction form
    21,238.73/29,310.19 = 11,679.34/x
  3. Step 3: Cross multiply
    21,238.73x = 29,310.19 × 11,679.34
  4. Step 4: Simplify right side
    21,238.73x = 342,323,725.71
  5. Step 5: Solve for x
    x = 342,323,725.71/21,238.73
  6. Step 6: Final answer
    x = 16,117.90

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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.