Home / 21,150.06-31,717.80-7,107.90

Finding the Fourth Proportional to 21,150.06, 31,717.80 and 7,107.90

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Solution

The fourth proportional to 21,150.06, 31,717.80 and 7,107.90 is: 10,659.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.06 : 31,717.80 = 7,107.90 : x
  2. Step 2: Convert to fraction form
    21,150.06/31,717.80 = 7,107.90/x
  3. Step 3: Cross multiply
    21,150.06x = 31,717.80 × 7,107.90
  4. Step 4: Simplify right side
    21,150.06x = 225,446,950.62
  5. Step 5: Solve for x
    x = 225,446,950.62/21,150.06
  6. Step 6: Final answer
    x = 10,659.40

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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.