Home / 21,218.05-29,279.76-11,786

Finding the Fourth Proportional to 21,218.05, 29,279.76 and 11,786

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Solution

The fourth proportional to 21,218.05, 29,279.76 and 11,786 is: 16,264.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.05 : 29,279.76 = 11,786 : x
  2. Step 2: Convert to fraction form
    21,218.05/29,279.76 = 11,786/x
  3. Step 3: Cross multiply
    21,218.05x = 29,279.76 × 11,786
  4. Step 4: Simplify right side
    21,218.05x = 345,091,251.36
  5. Step 5: Solve for x
    x = 345,091,251.36/21,218.05
  6. Step 6: Final answer
    x = 16,264.05

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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.