Home / 21,210.29-29,284.85-13,256.09

Finding the Fourth Proportional to 21,210.29, 29,284.85 and 13,256.09

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Solution

The fourth proportional to 21,210.29, 29,284.85 and 13,256.09 is: 18,302.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.29 : 29,284.85 = 13,256.09 : x
  2. Step 2: Convert to fraction form
    21,210.29/29,284.85 = 13,256.09/x
  3. Step 3: Cross multiply
    21,210.29x = 29,284.85 × 13,256.09
  4. Step 4: Simplify right side
    21,210.29x = 388,202,540.96
  5. Step 5: Solve for x
    x = 388,202,540.96/21,210.29
  6. Step 6: Final answer
    x = 18,302.56

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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.