Home / 6,521.56-9,783.78-2,139.28

Finding the Fourth Proportional to 6,521.56, 9,783.78 and 2,139.28

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Solution

The fourth proportional to 6,521.56, 9,783.78 and 2,139.28 is: 3,209.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,521.56 : 9,783.78 = 2,139.28 : x
  2. Step 2: Convert to fraction form
    6,521.56/9,783.78 = 2,139.28/x
  3. Step 3: Cross multiply
    6,521.56x = 9,783.78 × 2,139.28
  4. Step 4: Simplify right side
    6,521.56x = 20,930,244.88
  5. Step 5: Solve for x
    x = 20,930,244.88/6,521.56
  6. Step 6: Final answer
    x = 3,209.39

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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.