Home / 21,721.94-29,960.81-19,935.18

Finding the Fourth Proportional to 21,721.94, 29,960.81 and 19,935.18

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Solution

The fourth proportional to 21,721.94, 29,960.81 and 19,935.18 is: 27,496.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.94 : 29,960.81 = 19,935.18 : x
  2. Step 2: Convert to fraction form
    21,721.94/29,960.81 = 19,935.18/x
  3. Step 3: Cross multiply
    21,721.94x = 29,960.81 × 19,935.18
  4. Step 4: Simplify right side
    21,721.94x = 597,274,140.30
  5. Step 5: Solve for x
    x = 597,274,140.30/21,721.94
  6. Step 6: Final answer
    x = 27,496.35

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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.