Home / 6,405-8,839.20-3,610.50

Finding the Fourth Proportional to 6,405, 8,839.20 and 3,610.50

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Solution

The fourth proportional to 6,405, 8,839.20 and 3,610.50 is: 4,982.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405 : 8,839.20 = 3,610.50 : x
  2. Step 2: Convert to fraction form
    6,405/8,839.20 = 3,610.50/x
  3. Step 3: Cross multiply
    6,405x = 8,839.20 × 3,610.50
  4. Step 4: Simplify right side
    6,405x = 31,913,931.60
  5. Step 5: Solve for x
    x = 31,913,931.60/6,405
  6. Step 6: Final answer
    x = 4,982.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.