Home / 6,519.70-9,781.35-2,140.21

Finding the Fourth Proportional to 6,519.70, 9,781.35 and 2,140.21

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Solution

The fourth proportional to 6,519.70, 9,781.35 and 2,140.21 is: 3,210.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,519.70 : 9,781.35 = 2,140.21 : x
  2. Step 2: Convert to fraction form
    6,519.70/9,781.35 = 2,140.21/x
  3. Step 3: Cross multiply
    6,519.70x = 9,781.35 × 2,140.21
  4. Step 4: Simplify right side
    6,519.70x = 20,934,143.08
  5. Step 5: Solve for x
    x = 20,934,143.08/6,519.70
  6. Step 6: Final answer
    x = 3,210.91

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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.