Home / 21,385.47-29,511.89-11,694.93

Finding the Fourth Proportional to 21,385.47, 29,511.89 and 11,694.93

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Solution

The fourth proportional to 21,385.47, 29,511.89 and 11,694.93 is: 16,138.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.47 : 29,511.89 = 11,694.93 : x
  2. Step 2: Convert to fraction form
    21,385.47/29,511.89 = 11,694.93/x
  3. Step 3: Cross multiply
    21,385.47x = 29,511.89 × 11,694.93
  4. Step 4: Simplify right side
    21,385.47x = 345,139,516.96
  5. Step 5: Solve for x
    x = 345,139,516.96/21,385.47
  6. Step 6: Final answer
    x = 16,138.97

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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.