Home / 7,319.76-10,979.80-2,640.14

Finding the Fourth Proportional to 7,319.76, 10,979.80 and 2,640.14

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Solution

The fourth proportional to 7,319.76, 10,979.80 and 2,640.14 is: 3,960.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319.76 : 10,979.80 = 2,640.14 : x
  2. Step 2: Convert to fraction form
    7,319.76/10,979.80 = 2,640.14/x
  3. Step 3: Cross multiply
    7,319.76x = 10,979.80 × 2,640.14
  4. Step 4: Simplify right side
    7,319.76x = 28,988,209.17
  5. Step 5: Solve for x
    x = 28,988,209.17/7,319.76
  6. Step 6: Final answer
    x = 3,960.27

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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.