Home / 7,120.36-10,680.54-2,189.89

Finding the Fourth Proportional to 7,120.36, 10,680.54 and 2,189.89

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Solution

The fourth proportional to 7,120.36, 10,680.54 and 2,189.89 is: 3,284.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.36 : 10,680.54 = 2,189.89 : x
  2. Step 2: Convert to fraction form
    7,120.36/10,680.54 = 2,189.89/x
  3. Step 3: Cross multiply
    7,120.36x = 10,680.54 × 2,189.89
  4. Step 4: Simplify right side
    7,120.36x = 23,389,207.74
  5. Step 5: Solve for x
    x = 23,389,207.74/7,120.36
  6. Step 6: Final answer
    x = 3,284.84

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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.