Home / 7,120.12-10,680.20-1,926.12

Finding the Fourth Proportional to 7,120.12, 10,680.20 and 1,926.12

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Solution

The fourth proportional to 7,120.12, 10,680.20 and 1,926.12 is: 2,889.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.12 : 10,680.20 = 1,926.12 : x
  2. Step 2: Convert to fraction form
    7,120.12/10,680.20 = 1,926.12/x
  3. Step 3: Cross multiply
    7,120.12x = 10,680.20 × 1,926.12
  4. Step 4: Simplify right side
    7,120.12x = 20,571,346.82
  5. Step 5: Solve for x
    x = 20,571,346.82/7,120.12
  6. Step 6: Final answer
    x = 2,889.19

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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.