Home / 21,371.04-29,489.40-11,939.40

Finding the Fourth Proportional to 21,371.04, 29,489.40 and 11,939.40

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Solution

The fourth proportional to 21,371.04, 29,489.40 and 11,939.40 is: 16,474.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,371.04 : 29,489.40 = 11,939.40 : x
  2. Step 2: Convert to fraction form
    21,371.04/29,489.40 = 11,939.40/x
  3. Step 3: Cross multiply
    21,371.04x = 29,489.40 × 11,939.40
  4. Step 4: Simplify right side
    21,371.04x = 352,085,742.36
  5. Step 5: Solve for x
    x = 352,085,742.36/21,371.04
  6. Step 6: Final answer
    x = 16,474.90

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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.