Home / 17,142.80-25,703.10-7,279.40

Finding the Fourth Proportional to 17,142.80, 25,703.10 and 7,279.40

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Solution

The fourth proportional to 17,142.80, 25,703.10 and 7,279.40 is: 10,914.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,142.80 : 25,703.10 = 7,279.40 : x
  2. Step 2: Convert to fraction form
    17,142.80/25,703.10 = 7,279.40/x
  3. Step 3: Cross multiply
    17,142.80x = 25,703.10 × 7,279.40
  4. Step 4: Simplify right side
    17,142.80x = 187,103,146.14
  5. Step 5: Solve for x
    x = 187,103,146.14/17,142.80
  6. Step 6: Final answer
    x = 10,914.39

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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.