Home / 8,439.40-12,661.80-3,757.60

Finding the Fourth Proportional to 8,439.40, 12,661.80 and 3,757.60

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Solution

The fourth proportional to 8,439.40, 12,661.80 and 3,757.60 is: 5,637.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.40 : 12,661.80 = 3,757.60 : x
  2. Step 2: Convert to fraction form
    8,439.40/12,661.80 = 3,757.60/x
  3. Step 3: Cross multiply
    8,439.40x = 12,661.80 × 3,757.60
  4. Step 4: Simplify right side
    8,439.40x = 47,577,979.68
  5. Step 5: Solve for x
    x = 47,577,979.68/8,439.40
  6. Step 6: Final answer
    x = 5,637.60

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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.