Home / 6,520.20-9,780.30-2,138.10

Finding the Fourth Proportional to 6,520.20, 9,780.30 and 2,138.10

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Solution

The fourth proportional to 6,520.20, 9,780.30 and 2,138.10 is: 3,207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,520.20 : 9,780.30 = 2,138.10 : x
  2. Step 2: Convert to fraction form
    6,520.20/9,780.30 = 2,138.10/x
  3. Step 3: Cross multiply
    6,520.20x = 9,780.30 × 2,138.10
  4. Step 4: Simplify right side
    6,520.20x = 20,911,259.43
  5. Step 5: Solve for x
    x = 20,911,259.43/6,520.20
  6. Step 6: Final answer
    x = 3,207.15

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Half scale
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Double scale
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Similar ratio
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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.