Home / 6,409.20-9,621.60-3,637.80

Finding the Fourth Proportional to 6,409.20, 9,621.60 and 3,637.80

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Solution

The fourth proportional to 6,409.20, 9,621.60 and 3,637.80 is: 5,461.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.20 : 9,621.60 = 3,637.80 : x
  2. Step 2: Convert to fraction form
    6,409.20/9,621.60 = 3,637.80/x
  3. Step 3: Cross multiply
    6,409.20x = 9,621.60 × 3,637.80
  4. Step 4: Simplify right side
    6,409.20x = 35,001,456.48
  5. Step 5: Solve for x
    x = 35,001,456.48/6,409.20
  6. Step 6: Final answer
    x = 5,461.13

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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.