Home / 21,678.10-29,910.77-12,725.17

Finding the Fourth Proportional to 21,678.10, 29,910.77 and 12,725.17

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Solution

The fourth proportional to 21,678.10, 29,910.77 and 12,725.17 is: 17,557.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.10 : 29,910.77 = 12,725.17 : x
  2. Step 2: Convert to fraction form
    21,678.10/29,910.77 = 12,725.17/x
  3. Step 3: Cross multiply
    21,678.10x = 29,910.77 × 12,725.17
  4. Step 4: Simplify right side
    21,678.10x = 380,619,542.40
  5. Step 5: Solve for x
    x = 380,619,542.40/21,678.10
  6. Step 6: Final answer
    x = 17,557.79

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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.