Home / 21,075.25-29,081.28-11,643.88

Finding the Fourth Proportional to 21,075.25, 29,081.28 and 11,643.88

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Solution

The fourth proportional to 21,075.25, 29,081.28 and 11,643.88 is: 16,067.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.25 : 29,081.28 = 11,643.88 : x
  2. Step 2: Convert to fraction form
    21,075.25/29,081.28 = 11,643.88/x
  3. Step 3: Cross multiply
    21,075.25x = 29,081.28 × 11,643.88
  4. Step 4: Simplify right side
    21,075.25x = 338,618,934.57
  5. Step 5: Solve for x
    x = 338,618,934.57/21,075.25
  6. Step 6: Final answer
    x = 16,067.14

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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.