Home / 6,521.70-9,782.55-2,139.60

Finding the Fourth Proportional to 6,521.70, 9,782.55 and 2,139.60

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Solution

The fourth proportional to 6,521.70, 9,782.55 and 2,139.60 is: 3,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,521.70 : 9,782.55 = 2,139.60 : x
  2. Step 2: Convert to fraction form
    6,521.70/9,782.55 = 2,139.60/x
  3. Step 3: Cross multiply
    6,521.70x = 9,782.55 × 2,139.60
  4. Step 4: Simplify right side
    6,521.70x = 20,930,743.98
  5. Step 5: Solve for x
    x = 20,930,743.98/6,521.70
  6. Step 6: Final answer
    x = 3,209.40

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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.