Home / 21,717.80-29,974.98-20,240.36

Finding the Fourth Proportional to 21,717.80, 29,974.98 and 20,240.36

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Solution

The fourth proportional to 21,717.80, 29,974.98 and 20,240.36 is: 27,935.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.80 : 29,974.98 = 20,240.36 : x
  2. Step 2: Convert to fraction form
    21,717.80/29,974.98 = 20,240.36/x
  3. Step 3: Cross multiply
    21,717.80x = 29,974.98 × 20,240.36
  4. Step 4: Simplify right side
    21,717.80x = 606,704,386.19
  5. Step 5: Solve for x
    x = 606,704,386.19/21,717.80
  6. Step 6: Final answer
    x = 27,935.81

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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.