Home / 21,214.29-29,290.37-13,260.09

Finding the Fourth Proportional to 21,214.29, 29,290.37 and 13,260.09

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Solution

The fourth proportional to 21,214.29, 29,290.37 and 13,260.09 is: 18,308.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.29 : 29,290.37 = 13,260.09 : x
  2. Step 2: Convert to fraction form
    21,214.29/29,290.37 = 13,260.09/x
  3. Step 3: Cross multiply
    21,214.29x = 29,290.37 × 13,260.09
  4. Step 4: Simplify right side
    21,214.29x = 388,392,876.03
  5. Step 5: Solve for x
    x = 388,392,876.03/21,214.29
  6. Step 6: Final answer
    x = 18,308.08

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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.