Home / 21,251.58-29,310.70-13,699.14

Finding the Fourth Proportional to 21,251.58, 29,310.70 and 13,699.14

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Solution

The fourth proportional to 21,251.58, 29,310.70 and 13,699.14 is: 18,894.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.58 : 29,310.70 = 13,699.14 : x
  2. Step 2: Convert to fraction form
    21,251.58/29,310.70 = 13,699.14/x
  3. Step 3: Cross multiply
    21,251.58x = 29,310.70 × 13,699.14
  4. Step 4: Simplify right side
    21,251.58x = 401,531,382.80
  5. Step 5: Solve for x
    x = 401,531,382.80/21,251.58
  6. Step 6: Final answer
    x = 18,894.19

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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.