Home / 6,145.20-9,217.80-5,780.70

Finding the Fourth Proportional to 6,145.20, 9,217.80 and 5,780.70

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Solution

The fourth proportional to 6,145.20, 9,217.80 and 5,780.70 is: 8,671.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,145.20 : 9,217.80 = 5,780.70 : x
  2. Step 2: Convert to fraction form
    6,145.20/9,217.80 = 5,780.70/x
  3. Step 3: Cross multiply
    6,145.20x = 9,217.80 × 5,780.70
  4. Step 4: Simplify right side
    6,145.20x = 53,285,336.46
  5. Step 5: Solve for x
    x = 53,285,336.46/6,145.20
  6. Step 6: Final answer
    x = 8,671.05

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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.