Home / 21,106.80-31,651.56-7,952.04

Finding the Fourth Proportional to 21,106.80, 31,651.56 and 7,952.04

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Solution

The fourth proportional to 21,106.80, 31,651.56 and 7,952.04 is: 11,924.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.80 : 31,651.56 = 7,952.04 : x
  2. Step 2: Convert to fraction form
    21,106.80/31,651.56 = 7,952.04/x
  3. Step 3: Cross multiply
    21,106.80x = 31,651.56 × 7,952.04
  4. Step 4: Simplify right side
    21,106.80x = 251,694,471.18
  5. Step 5: Solve for x
    x = 251,694,471.18/21,106.80
  6. Step 6: Final answer
    x = 11,924.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.