Home / 21,126.72-29,160.69-12,634.68

Finding the Fourth Proportional to 21,126.72, 29,160.69 and 12,634.68

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Solution

The fourth proportional to 21,126.72, 29,160.69 and 12,634.68 is: 17,439.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.72 : 29,160.69 = 12,634.68 : x
  2. Step 2: Convert to fraction form
    21,126.72/29,160.69 = 12,634.68/x
  3. Step 3: Cross multiply
    21,126.72x = 29,160.69 × 12,634.68
  4. Step 4: Simplify right side
    21,126.72x = 368,435,986.73
  5. Step 5: Solve for x
    x = 368,435,986.73/21,126.72
  6. Step 6: Final answer
    x = 17,439.34

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Half scale
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Double scale
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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.