Home / 7,279.80-10,918.50-3,120.48

Finding the Fourth Proportional to 7,279.80, 10,918.50 and 3,120.48

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Solution

The fourth proportional to 7,279.80, 10,918.50 and 3,120.48 is: 4,680.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.80 : 10,918.50 = 3,120.48 : x
  2. Step 2: Convert to fraction form
    7,279.80/10,918.50 = 3,120.48/x
  3. Step 3: Cross multiply
    7,279.80x = 10,918.50 × 3,120.48
  4. Step 4: Simplify right side
    7,279.80x = 34,070,960.88
  5. Step 5: Solve for x
    x = 34,070,960.88/7,279.80
  6. Step 6: Final answer
    x = 4,680.21

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1.5x scale

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.