Home / 21,439.66-29,579.84-13,891.80

Finding the Fourth Proportional to 21,439.66, 29,579.84 and 13,891.80

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Solution

The fourth proportional to 21,439.66, 29,579.84 and 13,891.80 is: 19,166.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.66 : 29,579.84 = 13,891.80 : x
  2. Step 2: Convert to fraction form
    21,439.66/29,579.84 = 13,891.80/x
  3. Step 3: Cross multiply
    21,439.66x = 29,579.84 × 13,891.80
  4. Step 4: Simplify right side
    21,439.66x = 410,917,221.31
  5. Step 5: Solve for x
    x = 410,917,221.31/21,439.66
  6. Step 6: Final answer
    x = 19,166.22

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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.