Home / 13,135.20-19,717.20-7,288.80

Finding the Fourth Proportional to 13,135.20, 19,717.20 and 7,288.80

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Solution

The fourth proportional to 13,135.20, 19,717.20 and 7,288.80 is: 10,941.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.20 : 19,717.20 = 7,288.80 : x
  2. Step 2: Convert to fraction form
    13,135.20/19,717.20 = 7,288.80/x
  3. Step 3: Cross multiply
    13,135.20x = 19,717.20 × 7,288.80
  4. Step 4: Simplify right side
    13,135.20x = 143,714,727.36
  5. Step 5: Solve for x
    x = 143,714,727.36/13,135.20
  6. Step 6: Final answer
    x = 10,941.19

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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.