Home / 6,421.80-9,632.70-3,948.60

Finding the Fourth Proportional to 6,421.80, 9,632.70 and 3,948.60

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Solution

The fourth proportional to 6,421.80, 9,632.70 and 3,948.60 is: 5,922.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.80 : 9,632.70 = 3,948.60 : x
  2. Step 2: Convert to fraction form
    6,421.80/9,632.70 = 3,948.60/x
  3. Step 3: Cross multiply
    6,421.80x = 9,632.70 × 3,948.60
  4. Step 4: Simplify right side
    6,421.80x = 38,035,679.22
  5. Step 5: Solve for x
    x = 38,035,679.22/6,421.80
  6. Step 6: Final answer
    x = 5,922.90

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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.