Home / 19,145.88-28,717.29-12,105.36

Finding the Fourth Proportional to 19,145.88, 28,717.29 and 12,105.36

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Solution

The fourth proportional to 19,145.88, 28,717.29 and 12,105.36 is: 18,157.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.88 : 28,717.29 = 12,105.36 : x
  2. Step 2: Convert to fraction form
    19,145.88/28,717.29 = 12,105.36/x
  3. Step 3: Cross multiply
    19,145.88x = 28,717.29 × 12,105.36
  4. Step 4: Simplify right side
    19,145.88x = 347,633,133.67
  5. Step 5: Solve for x
    x = 347,633,133.67/19,145.88
  6. Step 6: Final answer
    x = 18,157.07

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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.