Home / 7,120.87-10,682.51-2,190.40

Finding the Fourth Proportional to 7,120.87, 10,682.51 and 2,190.40

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Solution

The fourth proportional to 7,120.87, 10,682.51 and 2,190.40 is: 3,285.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.87 : 10,682.51 = 2,190.40 : x
  2. Step 2: Convert to fraction form
    7,120.87/10,682.51 = 2,190.40/x
  3. Step 3: Cross multiply
    7,120.87x = 10,682.51 × 2,190.40
  4. Step 4: Simplify right side
    7,120.87x = 23,398,948.67
  5. Step 5: Solve for x
    x = 23,398,948.67/7,120.87
  6. Step 6: Final answer
    x = 3,285.97

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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.