Home / 21,511.03-29,687.33-12,436.78

Finding the Fourth Proportional to 21,511.03, 29,687.33 and 12,436.78

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Solution

The fourth proportional to 21,511.03, 29,687.33 and 12,436.78 is: 17,163.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.03 : 29,687.33 = 12,436.78 : x
  2. Step 2: Convert to fraction form
    21,511.03/29,687.33 = 12,436.78/x
  3. Step 3: Cross multiply
    21,511.03x = 29,687.33 × 12,436.78
  4. Step 4: Simplify right side
    21,511.03x = 369,214,581.38
  5. Step 5: Solve for x
    x = 369,214,581.38/21,511.03
  6. Step 6: Final answer
    x = 17,163.97

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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.