Home / 21,013.13-29,009.99-13,949.21

Finding the Fourth Proportional to 21,013.13, 29,009.99 and 13,949.21

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Solution

The fourth proportional to 21,013.13, 29,009.99 and 13,949.21 is: 19,257.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.13 : 29,009.99 = 13,949.21 : x
  2. Step 2: Convert to fraction form
    21,013.13/29,009.99 = 13,949.21/x
  3. Step 3: Cross multiply
    21,013.13x = 29,009.99 × 13,949.21
  4. Step 4: Simplify right side
    21,013.13x = 404,666,442.61
  5. Step 5: Solve for x
    x = 404,666,442.61/21,013.13
  6. Step 6: Final answer
    x = 19,257.79

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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.