Home / 21,372.04-29,490.78-11,940.40

Finding the Fourth Proportional to 21,372.04, 29,490.78 and 11,940.40

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Solution

The fourth proportional to 21,372.04, 29,490.78 and 11,940.40 is: 16,476.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,372.04 : 29,490.78 = 11,940.40 : x
  2. Step 2: Convert to fraction form
    21,372.04/29,490.78 = 11,940.40/x
  3. Step 3: Cross multiply
    21,372.04x = 29,490.78 × 11,940.40
  4. Step 4: Simplify right side
    21,372.04x = 352,131,709.51
  5. Step 5: Solve for x
    x = 352,131,709.51/21,372.04
  6. Step 6: Final answer
    x = 16,476.28

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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.