Home / 21,190.94-29,240.25-12,691.07

Finding the Fourth Proportional to 21,190.94, 29,240.25 and 12,691.07

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Solution

The fourth proportional to 21,190.94, 29,240.25 and 12,691.07 is: 17,511.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.94 : 29,240.25 = 12,691.07 : x
  2. Step 2: Convert to fraction form
    21,190.94/29,240.25 = 12,691.07/x
  3. Step 3: Cross multiply
    21,190.94x = 29,240.25 × 12,691.07
  4. Step 4: Simplify right side
    21,190.94x = 371,090,059.57
  5. Step 5: Solve for x
    x = 371,090,059.57/21,190.94
  6. Step 6: Final answer
    x = 17,511.73

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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.