Home / 21,631.45-29,857.79-12,680.89

Finding the Fourth Proportional to 21,631.45, 29,857.79 and 12,680.89

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Solution

The fourth proportional to 21,631.45, 29,857.79 and 12,680.89 is: 17,503.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.45 : 29,857.79 = 12,680.89 : x
  2. Step 2: Convert to fraction form
    21,631.45/29,857.79 = 12,680.89/x
  3. Step 3: Cross multiply
    21,631.45x = 29,857.79 × 12,680.89
  4. Step 4: Simplify right side
    21,631.45x = 378,623,287.23
  5. Step 5: Solve for x
    x = 378,623,287.23/21,631.45
  6. Step 6: Final answer
    x = 17,503.37

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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.