Home / 6,543.60-9,815.40-3,778.80

Finding the Fourth Proportional to 6,543.60, 9,815.40 and 3,778.80

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Solution

The fourth proportional to 6,543.60, 9,815.40 and 3,778.80 is: 5,668.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,543.60 : 9,815.40 = 3,778.80 : x
  2. Step 2: Convert to fraction form
    6,543.60/9,815.40 = 3,778.80/x
  3. Step 3: Cross multiply
    6,543.60x = 9,815.40 × 3,778.80
  4. Step 4: Simplify right side
    6,543.60x = 37,090,433.52
  5. Step 5: Solve for x
    x = 37,090,433.52/6,543.60
  6. Step 6: Final answer
    x = 5,668.20

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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.