Home / 13,145.20-19,717.80-3,911.20

Finding the Fourth Proportional to 13,145.20, 19,717.80 and 3,911.20

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Solution

The fourth proportional to 13,145.20, 19,717.80 and 3,911.20 is: 5,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.20 : 19,717.80 = 3,911.20 : x
  2. Step 2: Convert to fraction form
    13,145.20/19,717.80 = 3,911.20/x
  3. Step 3: Cross multiply
    13,145.20x = 19,717.80 × 3,911.20
  4. Step 4: Simplify right side
    13,145.20x = 77,120,259.36
  5. Step 5: Solve for x
    x = 77,120,259.36/13,145.20
  6. Step 6: Final answer
    x = 5,866.80

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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.